Music recs requested

One major thing I took away from this year's Vividcon is that my knowledge of music, specifically good vidding music, is woefully limited. I've been trying to expand by buying up tons of MP3 albums whenever Amazon has $5 sales and listening to Songza and Pandora, but I wouldn't mind getting some recs on artists past and present that I should look into.

This is especially important with Festivids coming up and my plan to make *all the vids*.

So, who do you love?