I know I know- this is the nanoGroove thread. But this isn't really their thread. Celguy started it and so- Celguy, if this post bothers you I will edit it so it is blank.
Scilor has taken over development of Groovefish (the free Grooveshark client for WinMo). He has released alphaV3 that works. You cannot access your play lists from Grooveshark, but you can create your own play list on your device. You can also save your play list to your device. I just thought some folks may not know about the fix and may be interested in supporting Scilor's work.
http://forum.xda-developers.com/showthread.php?t=640954