Now I want to talk a bit about the Amazon Kindle. I don't necessarily agree with the approach that Amazon is taking with the Kindle; we don't need Yet Another Proprietary E-Book Format (YAPEBF)! What's worse is that if the customer forgets his/her Kindle login and is traveling outside the US (the only place the Kindle can 'dial up' on it's own without needing a computer, said customer is SOL for buying an ebook. That's why Kindles aren't sold outside the US, there's no Sprint 'Whispernet' in all the other countries.
Other than those *major* flaws, I 'like' the Kindle. I still can't see any need for a full keyboard - even one of those chiclet-key versions the Kindle has, but I 'like' the Kindle. I'm like several others who find using the navigator strip controlled by the scroll-wheel a bit daunting, but if I didn't have a Cybook Gen3, I'd have bought a Kindle.
So I recommend the Cybook over the Sony PRS-505 and Amazon Kindle, but if you don't want to buy a Cybook, I recommend you get the Kindle.