I think it's a great start - and definitely outsmarts Sony.
What I'd like however are: (a) A larger screen and stylus / handwriting recognition instead of a key board (b) Support for native PDF files (now you need to convert to Doc and send it to Amazon who sends a converted proprietary file to your device).
That's all I need. And oh yes, the price needs to be lower too. $200 will just about cut it; $100 will be a blockbuster device.