I think the reason I'm not going 100% with an Android-rooted Nook is that the Kindle 3G comes with free wireless, forever. With the Nook, I'm not sure if I'd have to pay for connectivity. I guess as long as I can get on my home wireless router I don't really need 3G.
Incidentally there was a
whole thread intended to be about this. I got kind of scatterbrained.