Definitely something to keep an eye on:

https://itunes.apple.com/us/app/123d-cr ... mpt=uo%3D4

downloaded it yesterday -- haven't fully dug into it yet. i'm wondering if its bones system allows for animation within the app, or if they're at least exported along with the model for animating in other "real" 3d programs. regardless, should be fun!

Lettuce know how you find it to be, Bill!
In the comments, people are (of course) already pointing out some basic improvements which could be made; it will be interesting to see how it develops...

I was working with it last night and I am loving this app. Its easy enough for someone who hasn't ever used a program like this to sculpt 3d figures easy. The only issue I had with it so far is trying to get the image to line up correctly after I moved it. I had a hard time getting it into the exact position I wanted it for trying to sculpt. But nothing major.

Even if it doesn't include a boning system, you could always do that work in a more robust 3D app. This is really cool, possibly a good entry for people who are too intimidated by programs like Wings, Maya, and Lightwave. It'll almost certainly be a hit with the hobbyist Poser/Bryce crowd.