My wife and I were out shopping for an e-reader for her for Christmas, and what we found was similar to what you're posted. Here's my list:
Kindle pros - better interface (keyboard, searching, highlighting words/text, etc.), longer battery life per charge, screen looks a tad bit better, a little lighter and thinner.
Kindle cons - sealed battery, no option for digital media cards, proprietary eBook format, incompatible with local library eLending programs.
Nook pros - "open" eBook formats supported, compatible with Google scanned books, compatible with local library eLending programs, replaceable battery, memory expandable with digital media cards.
Nook cons - interface not as easy to use or intuitive, somewhat heavier/thicker than the Kindle, touch screen keyboard not as easy to use as the Kindle's physical keyboard.
If it weren't for the "open" nature of the Nook and its lending/library features, I think the Kindle would be a slam dunk. However, if you value those options (and they really appeal to my wife), I think that gives you serious reason to pick the Nook over the more refined Kindle.