There's a website in the UK called We7, which has music which you can stream for free and also some releases are free ad-supported downloads. I'm not sure if it's working in the USA & internationally yet, but I think it does in Europe. Here's a list of some of the music We7 has, the following are available as free & legal ad-supported downloads:

Brian McKnight Christmas album

Michael McDonald Christmas

Calvin Richardson - Facts of Life

George Clinton & his Gangsters of Love

Dam Funk's new album Toeachizown

J-Dilla, Jay Stay Paid

J-Dilla, Ruff Draft

J-Dilla, Donuts

Jaylib - Champion Sound (deluxe ed.)

Madvillainy

Silk - Always & Forever (...Magic etc)

If I remember anymore good music from We7, I'll add it to this topic.

thanks!!