It worked for me for a few hours. I went to send a chat message and it force closed and I was never able to get it working again after that despite reinstalling a couple times. It works fine on my Droid Incredible, so I've been playing it there.
Interestingly enough, I noticed the version on my phone was 4.?? and the version on the Prime was 3.?? (can't remember off the top of my head what the ??'s were). I looked around trying to see if there was a newer version I could get for the Prime and I couldn't locate anything. The reviews in the market were bashing it for quite a while for problems with forced closes, and it appears the tablet version still hasn't been fixed for this yet. :-(
~Gary