http://www.guvera.com
Just wondering if anyone is using this website?
Joined up to download mostly mainstream electronica. Currently has it's limitations thanks to the infancy of the concept - you'll run out of free downloads pretty quickly, but the bigger downside is don't expect to find anything remotely obscure.
I suppose as the concept and site becomes more popular and more sponsors jump on board, you'll find yourself with more free downloads and more choice.