Please get your facts straight before lambasting a guy providing a link.
And what is the ref= for?
Here is a review of the first jetBook color. Haven't seen much on the 2nd model: http://goodereader.com/blog/electronic-readers/ectaco-jetboo...
It's rather expensive, which would be my guess as to why it hasn't had a rapid expansion of market share.
Switching orientation to landscape makes most of my PDFs readable, at the cost of scrolling three times per page. It's not fun, but if necessary you can put up with it.
It works fine when you have a clean PDF with nothing but serial text (e.g. a novel).
Completely useless if your document is a less than perfect OCR job, if it has reasonably complex tables, math or non-Roman text (especially laid out in parallel with English translation). In other words, there's basically no way to read physics or Chinese philosophy papers from JSTOR with it.
Your average programming book might make it through okay, but might not. At the very least it's going to kill the indentation of any code samples (very bad for Python books).
I use Readability to take web pages, get rid of pagination and beam the raw text to my Kindle, and I love it.
Mine is just for reading books (not articles, reports, emails, blogs, etc). When I pick it up, I relax. I read books. Completely different to the ADD experience of picking up my ipad. Strangely, I went back to reading fiction after buying it.
It's amazingly handy while traveling to be able to read the news, check for important email, etc, without roaming. The current Kindles with 3G limit you to a small subset of the net, but the Keyboard is unlimited.
I personally love the e-Ink screen on my Kindle Keyboard 3G. I wish I could upgrade to the next generation, but Amazon has gone with the wisdom of the day and eliminated buttons from the newer generations of Kindles. I also wish I had a screen with high enough res to read PDFs comfortably. As it is, without the ability to reflow PDF text, paging through the document is an awkward experience.