Xubuntu Beta 2 is coming out this week and we need testers!
Testing is an excellent way to get involved with Xubuntu. It’s a vital part of our release cycle and anyone with a virtual machine (or even better, a spare computer!) can help out with it.
The Xubuntu community maintains extensive documents related to testing, we highly recommend you browse through these as you get more involved with testing:https://wiki.ubuntu.com/Xubuntu/Testing
But as a quick start, see this post for more about testing:http://xubuntu.org/news/help-test-xubuntu/