Very cool. Greg Rybarczyk is one of the smartest people working in sabermetrics today, and now he's appearing on ESPN:
This is simply cool. (Reportedly Nate Silver has descended from his Fortress of Solitude to appear on ESPN as well, but I have no video of that to share with you.)
Colin Wyers knows exactly how much of a nerd he is. He is very interested in hearing about any other concerns you may have; you can reach him by e-mail, and he will try his best to respond in a timely fashion. He also blogs at Statistically Speaking.