OK, you’ve now installed Ubuntu under Virtual PC or on your spare machine, or perhaps as your main computer. If you are a “newbie” to Ubuntu, as am I, you might want some suggestions on things you can do with your spiffy new OS. Never fear, I have scoured the web and found some sites and other blogs with some good suggestions.
Linux on Desktop: 13 Things to do immediately after installing Ubuntu.
Has some really useful suggestions on some basic things you will want to do to make you Ubuntu experience more enjoyable.
Ten Tips for New Ubuntu Users
Just as it says, some useful tips for those new to Ubuntu.
Check out the Ubuntu Forums
Lots of good info and a good community to ask questions and learn more.
A great podcast on Linux. Chess Griffin does a really good job with lots of info, including (search the archives) a three part introduction to Ubuntu.
If you are here, most likely you have some interest in .Net development. Mono is the open source project to allow you to do .Net development on the Linux platform. Check out the Mono pages for more info on .Net programming in Ubuntu.