I rooted my sister's NC and everything was working fine. Somehow, either by using the library or by adding another Google account it seems that she reset the NC and deregistered it. However, she still has Nook Color Tools and the other Apps in Extra. I was able to get the NC registered by going to Nook Color Tools, All Settings, 2nd Wireless and B&N setup. However, she still can't access the Market and it says "can't establish a reliable data connection." Any ideas besides wiping and rerooting? It seems that we just need to add her Google account back.