I am always looking for more good repositories for software. I noticed that the Debian forum here has a dozen pages in the thread by the same name - it has been stickied. Maybe we could do the same. A lot of newbies use Ubuntu and without (at the very least) medibuntu, there experience will suck and end after a few hours. I know my forays into Linux ended that way for about two years off and on, until I stumbled across a post that told me how to add multimedia to ubuntu. Using it ever since then.
my apt sources.lst
deb
http://archive.canonical.com/ubuntu intrepid partner
deb-src
http://archive.canonical.com/ubuntu intrepid partner
deb
http://mirrors.us.kernel.org/ubuntu/ intrepid-security main restricted
deb-src
http://mirrors.us.kernel.org/ubuntu/ intrepid-security main restricted
deb
http://mirrors.us.kernel.org/ubuntu/ intrepid-security universe
deb-src
http://mirrors.us.kernel.org/ubuntu/ intrepid-security universe
deb
http://mirrors.us.kernel.org/ubuntu/ intrepid-security multiverse
deb-src
http://mirrors.us.kernel.org/ubuntu/ intrepid-security multiverse
deb
http://debian.slimdevices.com stable main
deb
http://ppa.launchpad.net/zekr/ubuntu intrepid main
# Google software repository
# Google testing repository
deb
http://ppa.launchpad.net/rvm/ubuntu intrepid main
# deb
http://wine.budgetdedicated.com/apt intrepid main #WineHQ - Ubuntu 8.10 "Intrepid Ibex"
deb
http://ppa.launchpad.net/openoffice-pkgs/ubuntu intrepid main
deb
http://ppa.launchpad.net/team-xbmc/ubuntu intrepid main #XBMC