Groove Salad is very good, but sometimes it reminds me of porno music. I've been rotating between Space Station Soma and the Dubstep channel (which actually plays quality Dubstep (if such a thing exists)).

Soma.fm is one of the websites I like giving money too, I only wish they had cooler things in their store (I've got the mug, and the hoodies/t-shirts aren't too appealing to me).

Great choice. I was getting quite sick of listening to the same albums over and over until I found this and 'The Trip' Soma.fm channel.