Comment 2 for bug 175992

Thank you for taking the time to report this bug and trying to help make Ubuntu better. However, it seems that this package is available in another area.
http://ppa.launchpad.net/jef-norbit/ubuntu/pool/main/q/qgis/

is better to add it like this.

Add these lines to your /etc/apt/sources.list

deb http://ppa.launchpad.net/jef-norbit/ubuntu hardy main
deb-src http://ppa.launchpad.net/jef-norbit/ubuntu hardy main

Then do

sudo apt-get update
sudo apt-get install qgis