After spending over an hour at a Barnes and Noble store today - asking questions, reading on the Nook, etc - I will definitely choose the Nook over Amazon's Kindle. Here are my reasons why.
1. Kindle is proprietary - you can ONLY use it with books bought on Amazon.
The Nook is "open source" which means you can read e-books purchased or loaned from libraries where available with e-book functionality - including on Amazon.
That means that if Amazon puts an e-book on sale, you can purchase it for your Nook. But if Barnes and Noble or any other e-seller does, you cannot use it on the Kindle. And there are libraries that will lend e-books. The main Hunstville Library witll according to B&N. That's a big deal and is my main reason to choose the Nook.
2. Both of them have the same internal storage (2 gig). BUT the Kindle is not expandable. So if you use up the storage, you need to delete books to add more. The B&N Nook is expandle - and you can replace insdie to go from 2 to 8 gig. How kewl is that?
3. The Nook has 2 versions. The less expensive one is wifi only and (at least here in bama) only available online. The one comparable to the Kindle in price has both 3G and wifi. The Kindle only has 3G.
Now, let me explain a bit. The wifi means I can connect the Nook by using a wifi connection. So, if 3g isn't available, I can still connect anywhere I can take this online. Like using my MiFi wifi - will connect it. Or if you are traveling and staying at a park with a wifi connection, you can use that connection to go on.
Both have what they are calling "beta" browsers. I don't know how well the Kindle one works. I wouldn't recommend or want to try doing major browsing on one, but I did test, and could check my email on their. That means if I didn't have my computer, but had that with at any wifi connection, I could go online. That's pretty kewl.
4. Sharing Books. Kindle has no book sharing allowed. B&N will allow sharing, however, they have to follow the publishers rules. Therefore not all books can be shared and the publishers that are allowing sharing are limiting i to one time per book and a 14 day period. Still better than not having the option - and something that I would use with friends/family.
One of the things I really liked that is probably the same on both - is being able to change the text size. If I want to read in bed, I can make the text size a bit bigger and don't need my glasses. Actually I can read without them now, too, and do with "real" books - but that will make it easier.
Someone was curious about whether books could go from reading to listening. No. You'd have to purchase them that way. That may be in some future technology, but not yet - as it would probably be some type of computer generated voice to do that and now audio books are actually read, which is better.
But, on the Nook (I don't know about this on the Kindle) you can listen to music at the same time you read. Doubt I'd ever use that, but I know people who would.
Oh, yes, both can be connected to your computer - or read on your I-phone and other devices. I believe, if my memory serves me, that the Nook is available on some devices that Kindle isn't - but wasn't really interested in that for me, so didn't take notes on it.
I'm probably missing some points I discussed with them - but #1 above puts the Nook heads and shoulders above Kindle, for me.