I can't reproduce this here (see below). Are you using the latest version from Hardy?
[rainct, ubuntu-dev-tools]$ 404main filezilla Following packages aren't in main: libwxbase2.8-dev wx-common filezilla libgtk1.2-dev libgtk1.2-common libwxbase2.8-0 wx2.8-headers libglib1.2-dev libwxgtk2.8-0 libglib1.2ldbl libgtk1.2 filezilla-common libwxgtk2.8-dev
I can't reproduce this here (see below). Are you using the latest version from Hardy?
[rainct, ubuntu-dev-tools]$ 404main filezilla
Following packages aren't in main:
libwxbase2.8-dev
wx-common
filezilla
libgtk1.2-dev
libgtk1.2-common
libwxbase2.8-0
wx2.8-headers
libglib1.2-dev
libwxgtk2.8-0
libglib1.2ldbl
libgtk1.2
filezilla-common
libwxgtk2.8-dev