I have a Kindle II. The two things that the Nook has which I'd love to see Amazon copy are:

1. Better PDF support. I get a number of trade journals each month in PDF format that I'd love to read on my Kindle. The conversion stinks. I've played with the idea of getting a DX for them, but not with 2009 cut backs.

2. The Ability to Loan/Borrow a Book for Fourteen Days from/to a Friend. My sister is a Kindle user and I would love to do this with her. I'd also buy my Father-in-Law a Kindle if I couuld do that.