Until today, my main reason for liking Ubuntu was that is was a simple multi-user system without a root / administrator account to set up. After an unsuccessful attempt to build SPICE, I looked on the forums and learned about the various repositories for Ubuntu programs. Hitting the repositories is easy - I just hadn't ever tried the Ubuntu Add / Remove Programs before :)
So here's a nice resource that I bumped into on the forums: Ubuntu Scientists It shows projects like Oregano and gEDA and what repository they are in. Good stuff.