not really...i am trying this thing that wipes it supposedly...and its been "clearing contents for almost a half an hour now so maybe it is doing that...i can only hope...i found how to do that under this....
http://forums.zune.net/231510/ShowPost.aspx see if it will do any thing for you...i did the reboot and then hold the back and play/pause buttons.... im still looking around though to see if anyone knows..