With a freshly installed copy of Edgy Eft, Synaptic Package Manager (or apt-get if you prefer the command line) is where I’ve been hanging out. The ability to search for packages and add them (automatically adding dependencies) is excellent. It means I can add the tools I need to my Ubuntu installation and be productive. I’ve got Windows Vista RC1 and Ubuntu installed under Parallels. I’m spending a lot more time using Ubuntu and it feels more useful.