This stuff is more to the artsy side than most of the stuff y'all have posted so far, but here's my favorite stuff.
Jay Crocker & The Electric Apes - bluesy folk/rock
http://www.jaycrocker.com/info/downloads/
Axis of Conversation - art pop
http://www.myspace.com/axisofconversation
Gunther - instrumental prog
http://www.myspace.com/guunther
Lint - instrumental prog/metal
http://www.myspace.com/lintlintlint
Ghostkeeper - rock/folk
http://www.myspace.com/childrenofthegreatnorthernmuskeg
Olé
http://www.myspace.com/ole
All the links in my sig are the bands I play in.