Update: Just ran 3 miles barefoot (with my wife), and feel great! I found a place online that has the Sprint's for $65, with free shipping if you buy two pairs (which I will, we both want a pair!).
http://www.northernlightstrading.com...=6&id=W115!755
I'll post another update once I get them. I'm also thinking about ordering the POSE method dvd from posetech.com, a site devoted to low-padding and barefoot running techniques.