I discover a lot of new music from people I follow on Twitter, many of whom link to Youtube videos or Last.fm tracks. VC Fred Wilson (familiar to most here, I w

I discover a lot of new music from people I follow on Twitter, many of whom link to Youtube videos or Last.fm tracks. VC Fred Wilson (familiar to most here, I would imagine) is a good example of someone who tweets about what he's listening to regularly. I've discovered a number of new artists and sub-genres that way. As far as discovering new artists in genres that I really like, you can't beat Pandora.