With my handle, I had to weigh in on this thread!
I cannot help with the Nook vs Kindle choice, but can relay my nook experiences. For the longest time I resisted the jump to an e-reader as I always loved to read new fiction in hardcover or paperback. But I must admit after taking the plunge, I have never looked back. I have an older B&W nook with wireless and 3g and have probably ready over 30 books with it. It provides a convenient mechanism to take your reading on the road without having to pack a bunch of books. When on vacation I just need my iPod and my nook and I can sit under an umbrella and pass away the afternoon, while beckoning the raoming server for an occasional adult beverage.
The color version is supposed to be even better, but for my needs I just download and read and don't need a bunch of ancillary apps or functions. I am currently reading the new Brad Thor "Full Back" and just recently finished the latest Clancy.
You can resize or change the the fonts to make the text easier to read, especially for older eyes. Cost for new releases is about $12.99, so the ebooks don't tend to be super bargains from discounted new releases, but if you find a new author you enjoy (L. Childs or N. De Mille) you can get older works at cheaper prices. The nook was also compatible with the library for checking out ebooks. B&N also has a Free Fridays, where you can download a featured author's work for free. I read one of these and it was enjoyable, although most are not my genre. You can also lend ebook to other nooks, so if DW or DH each had one they can share.
Also makes gift giving easy as I am delighted by B&N gift cards that I register into my account and burn down with new downloads.
Nook
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Retired 07/29/2011 @ 50