anthony@anthony-desktop:~$ sudo apt-get update
Ign http://mirrors.gigenet.com precise Release.gpg
Ign http://mirrors.gigenet.com precise Release
Get:1 http://http.us.debian.org sid Release.gpg [1,571 B]
Ign http://mirrors.gigenet.com precise/main TranslationIndex
Ign http://mirrors.gigenet.com precise/multiverse TranslationIndex
Ign http://mirrors.gigenet.com precise/restricted TranslationIndex
Ign http://mirrors.gigenet.com precise/universe TranslationIndex
Get:2 http://archive.canonical.com precise Release.gpg [198 B]
Hit http://http.us.debian.org sid Release
Get:3 http://ca.archive.ubuntu.com precise-updates Release.gpg [198 B]
Get:4 http://ca.archive.ubuntu.com precise-backports Release.gpg [198 B]
Hit http://security.ubuntu.com precise-security Release.gpg
Get:5 http://extras.ubuntu.com precise Release.gpg [72 B]
Ign http://ppa.launchpad.net luna Release.gpg
Ign http://ppa.launchpad.net luna Release.gpg
Ign http://http.us.debian.org sid Release
Get:6 http://archive.canonical.com precise Release [7,078 B]
Get:7 http://http.us.debian.org sid/non-free amd64 Packages [85.9 kB]
Hit http://security.ubuntu.com precise-security Release
Get:8 http://ca.archive.ubuntu.com precise-updates Release [49.6 kB]
Hit http://extras.ubuntu.com precise Release
Ign http://ppa.launchpad.net luna Release
Get:9 http://security.ubuntu.com precise-security/main Sources [84.9 kB]
Ign http://ppa.launchpad.net luna Release
Get:10 http://archive.canonical.com precise/partner Sources [4,881 B]
Get:11 http://extras.ubuntu.com precise/main Sources [8,130 B]
Get:12 http://archive.canonical.com precise/partner amd64 Packages [7,892 B]
Hit http://extras.ubuntu.com precise/main amd64 Packages
Hit http://extras.ubuntu.com precise/main i386 Packages
Ign http://extras.ubuntu.com precise/main TranslationIndex
Ign http://ppa.launchpad.net luna/main TranslationIndex
Err http://mirrors.gigenet.com precise/main Sources
404 Not Found
Get:13 http://archive.canonical.com precise/partner i386 Packages [8,935 B]
Err http://mirrors.gigenet.com precise/restricted Sources
404 Not Found
Err http://mirrors.gigenet.com precise/universe Sources
404 Not Found
Err http://mirrors.gigenet.com precise/multiverse Sources
404 Not Found
Err http://mirrors.gigenet.com precise/main amd64 Packages
404 Not Found
Ign http://archive.canonical.com precise/partner TranslationIndex
Ign http://ppa.launchpad.net luna/main TranslationIndex
Hit http://http.us.debian.org sid/main amd64 Packages/DiffIndex
Err http://mirrors.gigenet.com precise/restricted amd64 Packages
404 Not Found
Err http://mirrors.gigenet.com precise/universe amd64 Packages
404 Not Found
Err http://mirrors.gigenet.com precise/multiverse amd64 Packages
404 Not Found
Err http://mirrors.gigenet.com precise/main i386 Packages
404 Not Found
Err http://mirrors.gigenet.com precise/restricted i386 Packages
404 Not Found
Err http://mirrors.gigenet.com precise/universe i386 Packages
404 Not Found
Get:14 http://http.us.debian.org sid/non-free i386 Packages [83.6 kB]
Err http://mirrors.gigenet.com precise/multiverse i386 Packages
404 Not Found
Get:15 http://ca.archive.ubuntu.com precise-backports Release [49.6 kB]
Get:16 http://security.ubuntu.com precise-security/restricted Sources [2,494 B]
Get:17 http://security.ubuntu.com precise-security/universe Sources [28.0 kB]
Hit http://http.us.debian.org sid/main i386 Packages/DiffIndex
Ign http://http.us.debian.org sid/main TranslationIndex
Ign http://http.us.debian.org sid/non-free TranslationIndex
Ign http://mirrors.gigenet.com precise/main Translation-en_CA
Ign http://mirrors.gigenet.com precise/main Translation-en
Get:18 http://security.ubuntu.com precise-security/multiverse Sources [1,383 B]
Hit http://security.ubuntu.com precise-security/main amd64 Packages
Hit http://security.ubuntu.com precise-security/restricted amd64 Packages
Hit http://security.ubuntu.com precise-security/universe amd64 Packages
Hit http://security.ubuntu.com precise-security/multiverse amd64 Packages
Hit http://security.ubuntu.com precise-security/main i386 Packages
Hit http://security.ubuntu.com precise-security/restricted i386 Packages
Hit http://security.ubuntu.com precise-security/universe i386 Packages
Hit http://security.ubuntu.com precise-security/multiverse i386 Packages
Hit http://security.ubuntu.com precise-security/main TranslationIndex
Ign http://mirrors.gigenet.com precise/multiverse Translation-en_CA
Ign http://mirrors.gigenet.com precise/multiverse Translation-en
Ign http://mirrors.gigenet.com precise/restricted Translation-en_CA
Ign http://mirrors.gigenet.com precise/restricted Translation-en
Ign http://mirrors.gigenet.com precise/universe Translation-en_CA
Ign http://mirrors.gigenet.com precise/universe Translation-en
Hit http://http.us.debian.org sid/main Translation-en
Hit http://security.ubuntu.com precise-security/multiverse TranslationIndex
Get:19 http://ca.archive.ubuntu.com precise-updates/main Sources [413 kB]
Get:20 http://http.us.debian.org sid/non-free Translation-en [73.9 kB]
Hit http://security.ubuntu.com precise-security/restricted TranslationIndex
Hit http://security.ubuntu.com precise-security/universe TranslationIndex
Hit http://security.ubuntu.com precise-security/main Translation-en
Hit http://security.ubuntu.com precise-security/multiverse Translation-en
Hit http://security.ubuntu.com precise-security/restricted Translation-en
Hit http://security.ubuntu.com precise-security/universe Translation-en
Ign http://http.us.debian.org sid/main Translation-en_CA
Err http://ppa.launchpad.net luna/main Sources
404 Not Found
Err http://ppa.launchpad.net luna/main amd64 Packages
404 Not Found
Err http://ppa.launchpad.net luna/main i386 Packages
404 Not Found
Ign http://extras.ubuntu.com precise/main Translation-en_CA
Err http://ppa.launchpad.net luna/main Sources
404 Not Found
Err http://ppa.launchpad.net luna/main amd64 Packages
404 Not Found
Err http://ppa.launchpad.net luna/main i386 Packages
404 Not Found
Ign http://http.us.debian.org sid/non-free Translation-en_CA
Get:21 http://ca.archive.ubuntu.com precise-updates/restricted Sources [5,467 B]
Get:22 http://ca.archive.ubuntu.com precise-updates/universe Sources [93.9 kB]
Ign http://archive.canonical.com precise/partner Translation-en_CA
Ign http://extras.ubuntu.com precise/main Translation-en
Ign http://ppa.launchpad.net luna/main Translation-en_CA
Get:23 http://ca.archive.ubuntu.com precise-updates/multiverse Sources [6,582 B]
Get:24 http://ca.archive.ubuntu.com precise-updates/main amd64 Packages [672 kB]
Ign http://archive.canonical.com precise/partner Translation-en
Ign http://ppa.launchpad.net luna/main Translation-en
Ign http://ppa.launchpad.net luna/main Translation-en_CA
Ign http://ppa.launchpad.net luna/main Translation-en
Get:25 http://ca.archive.ubuntu.com precise-updates/restricted amd64 Packages [10.1 kB]
Get:26 http://ca.archive.ubuntu.com precise-updates/universe amd64 Packages [211 kB]
Get:27 http://ca.archive.ubuntu.com precise-updates/multiverse amd64 Packages [13.6 kB]
Get:28 http://ca.archive.ubuntu.com precise-updates/main i386 Packages [692 kB]
Get:29 http://ca.archive.ubuntu.com precise-updates/restricted i386 Packages [10.0 kB]
Get:30 http://ca.archive.ubuntu.com precise-updates/universe i386 Packages [215 kB]
Get:31 http://ca.archive.ubuntu.com precise-updates/multiverse i386 Packages [13.8 kB]
Hit http://ca.archive.ubuntu.com precise-updates/main TranslationIndex
Hit http://ca.archive.ubuntu.com precise-updates/multiverse TranslationIndex
Hit http://ca.archive.ubuntu.com precise-updates/restricted TranslationIndex
Hit http://ca.archive.ubuntu.com precise-updates/universe TranslationIndex
Get:32 http://ca.archive.ubuntu.com precise-backports/main Sources [2,935 B]
Get:33 http://ca.archive.ubuntu.com precise-backports/restricted Sources [14 B]
Get:34 http://ca.archive.ubuntu.com precise-backports/universe Sources [35.2 kB]
Get:35 http://ca.archive.ubuntu.com precise-backports/multiverse Sources [5,311 B]
Get:36 http://ca.archive.ubuntu.com precise-backports/main amd64 Packages [2,378 B]
Get:37 http://ca.archive.ubuntu.com precise-backports/restricted amd64 Packages [14 B]
Get:38 http://ca.archive.ubuntu.com precise-backports/universe amd64 Packages [36.2 kB]
Get:39 http://ca.archive.ubuntu.com precise-backports/multiverse amd64 Packages [5,206 B]
Get:40 http://ca.archive.ubuntu.com precise-backports/main i386 Packages [2,390 B]
Get:41 http://ca.archive.ubuntu.com precise-backports/restricted i386 Packages [14 B]
Get:42 http://ca.archive.ubuntu.com precise-backports/universe i386 Packages [36.1 kB]
Get:43 http://ca.archive.ubuntu.com precise-backports/multiverse i386 Packages [5,178 B]
Get:44 http://ca.archive.ubuntu.com precise-backports/main TranslationIndex [72 B]
Get:45 http://ca.archive.ubuntu.com precise-backports/multiverse TranslationIndex [72 B]
Get:46 http://ca.archive.ubuntu.com precise-backports/restricted TranslationIndex [70 B]
Get:47 http://ca.archive.ubuntu.com precise-backports/universe TranslationIndex [73 B]
Hit http://ca.archive.ubuntu.com precise-updates/main Translation-en_CA
Hit http://ca.archive.ubuntu.com precise-updates/main Translation-en
Hit http://ca.archive.ubuntu.com precise-updates/multiverse Translation-en
Hit http://ca.archive.ubuntu.com precise-updates/restricted Translation-en
Hit http://ca.archive.ubuntu.com precise-updates/universe Translation-en_CA
Hit http://ca.archive.ubuntu.com precise-updates/universe Translation-en
Get:48 http://ca.archive.ubuntu.com precise-backports/main Translation-en [1,512 B]
Get:49 http://ca.archive.ubuntu.com precise-backports/multiverse Translation-en [4,610 B]
Get:50 http://ca.archive.ubuntu.com precise-backports/restricted Translation-en [14 B]
Get:51 http://ca.archive.ubuntu.com precise-backports/universe Translation-en [26.5 kB]
Fetched 3,018 kB in 8s (336 kB/s)
W: GPG error: http://http.us.debian.org sid Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY AED4B06F473041FA NO_PUBKEY 8B48AD6246925553
W: Failed to fetch http://mirrors.gigenet.com/debian/dists/precise/main/source/Sources 404 Not Found
W: Failed to fetch http://mirrors.gigenet.com/debian/dists/precise/restricted/source/Sources 404 Not Found
W: Failed to fetch http://mirrors.gigenet.com/debian/dists/precise/universe/source/Sources 404 Not Found
W: Failed to fetch http://mirrors.gigenet.com/debian/dists/precise/multiverse/source/Sources 404 Not Found
W: Failed to fetch http://mirrors.gigenet.com/debian/dists/precise/main/binary-amd64/Packages 404 Not Found
W: Failed to fetch http://mirrors.gigenet.com/debian/dists/precise/restricted/binary-amd64/Packages 404 Not Found
W: Failed to fetch http://mirrors.gigenet.com/debian/dists/precise/universe/binary-amd64/Packages 404 Not Found
W: Failed to fetch http://mirrors.gigenet.com/debian/dists/precise/multiverse/binary-amd64/Packages 404 Not Found
W: Failed to fetch http://mirrors.gigenet.com/debian/dists/precise/main/binary-i386/Packages 404 Not Found
W: Failed to fetch http://mirrors.gigenet.com/debian/dists/precise/restricted/binary-i386/Packages 404 Not Found
W: Failed to fetch http://mirrors.gigenet.com/debian/dists/precise/universe/binary-i386/Packages 404 Not Found
W: Failed to fetch http://mirrors.gigenet.com/debian/dists/precise/multiverse/binary-i386/Packages 404 Not Found
W: Failed to fetch http://ppa.launchpad.net/elementary-os/stable/ubuntu/dists/luna/main/source/Sources 404 Not Found
W: Failed to fetch http://ppa.launchpad.net/elementary-os/stable/ubuntu/dists/luna/main/binary-amd64/Packages 404 Not Found
W: Failed to fetch http://ppa.launchpad.net/elementary-os/stable/ubuntu/dists/luna/main/binary-i386/Packages 404 Not Found
W: Failed to fetch http://ppa.launchpad.net/elementary-os/os-patches/ubuntu/dists/luna/main/source/Sources 404 Not Found
W: Failed to fetch http://ppa.launchpad.net/elementary-os/os-patches/ubuntu/dists/luna/main/binary-amd64/Packages 404 Not Found
W: Failed to fetch http://ppa.launchpad.net/elementary-os/os-patches/ubuntu/dists/luna/main/binary-i386/Packages 404 Not Found
E: Some index files failed to download. They have been ignored, or old ones used instead.
anthony@anthony-desktop:~$
I get the same error. Worked fine yesterday, but today apt reports error on sources containing elementary-os (original sources, none added).