I rooted my Nook Simple Touch via TouchNooter 2.1.31. No hitches aside from the Market giving me a Server Error just after installing, which cleared up the next day. Since now I have my email (and in the future other sensitive apps/info) on the Nook I would like to be able to lock the screen like a full Android phone or tablet. Is this possible? I don't necessarily mean having the exact same way of locking (i.e., press the power button and the screen locks) but at least an app for doing that would be great. Any ideas?