What frustrate me with 8tracks, is that I didn't found a way to record their stream.
Or download a "full playlist", to listen it later.
And I don't understand this stupid "8 tracks" limitation. Why not up to 20 ?
From what I've read , 8tracks is streaming in 64kps aac+
I prefer to look at last.fm statistics (takes a bit some times), and when I find something interesting I just download it in lossless.
Also there's a script in mediamonkey, "last.fm node", that helps to imitate a radio : it gathers stats from last.fm, and use them to play similar tracks from your hard drive.