A blogger looked through the amazon user reviews of the Kindle 3 and made a quick summary. Makes for interesting reading:
http://ireaderreview.com/2010/08/30/...ers-at-amazon/
There's a section about what s/he perceives as the 'real' problems of the Kindle 3. I agree with at least one of them, which is point 2 regarding the Kindle 3 and freezes.