Yeah, I just got a grooveshark anywhere account a few months ago. It integrates nicely with Clementine (KDE music player) and XBMC. The nice part of the xbmc extension is that you can queue whatever in with your local music in party mode, keeping party guests from axing the playlist and throwing a keyboard around to listen to music using youtube videos (kids these days...). Unlike spotify, there's no proprietary library and DRM. Just an authenticated REST api and rate limited mp3s (+ api calls to keep it streaming). Which is how it should be (ideally with Vorbis, but that's because I'm a no good fsfnik).