I read my first book and a half on the Kindle reader for iPad last weekend.
Specifically I enjoyed:
* Masters of Doom
[http://www.amazon.com/Masters-Doom-Created-Transformed-ebook/dp/B000FBFNL0/ref=tmm_kin_title_0?ie=UTF8&m=AG56TWVU5XWC2&qid=1280802651&sr=1-1]
- a great book primary