Soma FM is awesome. I actually happened upon a guy wearing one of their shirts in a tiny little pub in Brizzle and ended up talking to him for ages, which was awesome. Groove Salad ftw. Illinois Street Lounge likewise.
I also enjoy:
1Mix Radio for dance choonage.
The 1920s Radio Network for stuff you definitely won't hear anywhere else. Crackly turn of the (20th) century stuff all the way up to the end of the big band era.
92.9 The Bull is a real radio station but it's also a great country station that ISN'T blocked outside the US. (I used to like WIRK 107.9 if for anything their slogan in the iTunes radio section: Where flipflops and cowboy boots mingle in the sand)
181.fm has several stations, I listen to the 80s one mostly.
EvE Radio features some surprisingly talented DJs and some downright hilarious shows to, as per the intermissions, gatecamp, jetcan mine or pod to.