A great free funk music stream, brought to you courtesy of the Canadian goernment. Enjoy:

http://www.cbcmusic.ca/music-streams/b236/Funk

I opened the link and it says streaming is 'Not available outside of Canada'.

I listen to WeFunk radio. They have a website or you can stream if you have Itunes.

http://www.wefunkradio.com/

They have been streaming since 1999 I think.