Although it's been talked about at XDA, creating a GrooveShark client for Windows Phone has so far eluded most of the developers there. But it looks like Devalane has managed to pull it off, releasing a free app for the music-streaming site. (For those who remember, we had the pretty awesome GrooveFish & NanoGroove for Windows Mobile.)
MusicShark, just released in the Marketplace, allows you to search for any artist and basically stream whatever is available on GrooveShark's site--which is quite extensive. Interestingly, outside of the app's logo and name, it makes no mention of accessing GrooveShark's music library (perhaps for legal reasons). But if you do a search on both, you'll see they match exactly in content. In addition to streaming, you can add songs to the queue and create a playlist. Unfortunately as of now, you can't login to your GrooveShark account, but for creating and streaming playlists, it seems to work well enough.
