Way back in the days of Napster and other whos names we've long ago forgotten, the natural choice was to go find music were you could find more than the Top 10, 20, 50 or 100 plus advertised stuff that any legal site could offer.
Looks like we're slowly getting there, although I would love to see a site or more that offered out of print stuff as well as obscure and the latest hits. A true one-stop for ones musical needs and explorations.
Here's a news item we found today that points in the right direction:
Amazon has made deals with Sony BMG, EMI and other labels to bring hundreds of out-of-print albums to CD using their CreateSpace “Disc on Demand” system. The new CDs will be manufactured on-demand and shipped when customers place an order.