Trifonic. Love their music. Discovered them randomly a few days ago. A few examples:
If you like them then you should support them.
You can get their whole album for $5. I don't know of any other digital music stores other than iTunes, but I hate the idea of Steve Jobs getting any of my money so I love these guys' independent model, quite happy to send $5 their way for a whole album. And better yet, they provide FLAC in case any of you are audiophiles like me. I could never come to terms with paying anything at all for just an mp3.