Hi. I've been monitoring the Cybook-related boards here for a few months via RSS. Good stuff, and I appreciate the info that people post here.
I've had a Cybook Gen3 for a little over a year and am pretty pleased with it for fiction reading. I no longer have to build another bookcase every couple of years.
Light non-fiction, e.g. layman's science books, work OK too. Technical reference books are another matter; the screen's just too small for diagrams and charts.
A friend at work just got a Kindle 2. He's actually not a heavy book reader, but he likes to read newspapers regularly and is excited about being able to have the Wall Street Journal and some others automatically download to it nightly.
Personally, I stayed away from the Kindle due to the sales model, and sent a note to Amazon letting them know this. I used to buy a fair number of books from them, but haven't bought more than one since getting the Cybook. But it is a nice device.