Yeap! We've been beta testing Mudbox too! :)
It is Beta and I can't say anything about it apart from showing some of the work I'm doing with it...

This is my very first Mudbox model, and it is NOT finished...
Actually, I am not sure if I'll finish it or not. I might just keep on doing more and doing different things to push my skills with the software.

I'll keep posting new tests as I progress...

Cheers!