Checking Out Creative Commons

I've noticed a number of times that Larry Lessig is always pimping for Creative Commons on his blog, and have always thought 'hmm, that must be a good thing.' Only recently did I have the brilliant idea to actually check it out and see what was there. So I poked around a bit and found one of their content aggregators, Magnatune. Magnatune (slogan: We Are Not Evil) has music from a good number groups/individuals which can be streamed in mp3 form for free and can be purchased for download at a cost of $5-$18 (your choice). So far I've managed to get completely hooked on music by a guy named Wade Williamson. Cool stuff.