I recently discovered a really cool band called 'Sundrown'. Their bluesy psychedelic rock is some of the best I've heard. Best of all, their music is available for free.
They have two albums out so far, the first named 'As We Watch The Sun Drown' and the second effort called 'Something Or Another'. Both albums are great, but I personally recommend starting out with the latter.
Also be sure to look out for their new album, 'The 8th Day Bliss', which is to be released soon!
Official Website: http://www.sundrown.net/
Audio Download: http://www.sundrown.net/audio.aspx