If you’re not squeamish about mucking about with your Nook and voiding your warranty, there’s a hack floating around that allows you to install Android 3.0 on it and supercharge the ebook reader into a full-fledged tablet.
It’s a hack in its infancy but the majority of functionality (graphics acceleration, wireless connectivity, touch screen, hardware buttons, etc.) are all there. The major missing component right now is lack of sound.
Check out the video below to see it in action.
Read up on hacking your Nook here and then hit up the link below to grab the files you need to experiment with Android 3.0 on it.