Instead of my commentary, you can just watch the video. I gotta admit, a mobile reader is pretty cool!
While this currently costs $400, it is sure to get cheaper in the near future. This product truly makes me feel like I am living in the age of the Jetsons.
To be fair, check out this review by Media 3.0:
Looks like you might want to wait until the 2nd generation readers hit the market. ;)