Here is the link to the website that gives the complete rundown between the nook simple touch and the kindle 3.
http://www.the-ebook-reader.com/nook...vs-kindle.html
An advantage not listed is that the kindle allows you to search for words or phrases within a book or among all the books on the device. You can also type in a word and easily look it up on wikipedia. Also, no fingerprints on the screen with k3.