I have a black and white version of the Nook, has wireless and 3G connections thru ATT, don't have to pay extra to use the connection to download books.
Love it, fits in my purse, is lightweight and battery lasts 3 - 4 weeks before needing a charge.
I can go to a Barnes n Noble book store and read any book free if I want.
Lots of free books from Barnes n Noble to download too.