Seems to have a pretty promissing list of radio stations. Thus far my favorite has to be the smooth jazz station, even though i think the best online radio station for smooth jazz is obviously smoothjazz.com but anyways, take a gander and see what you think.
This site has one of my favorite of all time radio stations which i absolutely cannot get enough of. It's called Groove Salad. Anyone who is into ambient / chilled out music will absolutely fall in love with this radio station.
my god do they have some kick-arse music, check it out, my favorite is the Jungle one 
I think this is probably one of the best deep house sites i've found in a very long time.
I think this is probably one of my favorite trance shoutcast streams because they have in my opinion the best track selection online.
Good place to get some nice Trance live-sets
This is a place where i go to listen to music when i really need something to listen to. They have All forms of Electronica including some More layed back genres such as Classical.