Couple of things here guys...
1) Good discussion on ASAP here BUT... why is everyone already jumping on the "pilot error" band wagon? The ERJ has a poorly designed nosewheel steering system to begin with and a track record of issues with the system. Without further information, my money would be on there being a malfunction with the steering over two pilots just veering off the runway.
2) Why why WHY did it have to be one of the aquafresh birds!?!?

I can see it now...
Press: Um, Uninental, care to comment on the incident involving one of your flights in Akron, OH today?
Uninental: Oh no, that wasn't us. See? Says ExpressJet in BIG letters right there on the side. We had NO involvement in that mess.