I have one of these and it is a very clever design and seemed to be about the best deal around when I purchased it -- http://bluumaxcnc.com/BluumaxCNC.html

Yes - I can install the latest Ubuntu on a 3-4 year old machine and it actually runs better than it did with the original OS.

Do not forget one of the true gems of WCBN -- a freeform show with "Uncle Dave Lewis" every other Thursday at 6AM. He has a great early jazz and classical collection and knows how to talk about historical recorded music. A joy to listen to.