I know a lot of folks have been waiting for these to come out. My opinion, you'll either love them or hate them. Depends on if you like Crocs...
http://www.maplegrovebarefootguy.com/2011/05/vivobarefoot-ultra-review.html
http://www.maplegrovebarefootguy.com/2011/05/vivobarefoot-ultra-review.html