checking out
http://www.earbits.com (pandora-like site... no ads). i like the idea of a 'station' but in practice it seems like human-picked 'stations' like plug.dj / turntable / soundrop / etc. are usually closer to my taste. i keep coming back to
http://www.last.fm because there is no clicking 'like' and 'dislike' and it already knows what i like.