Just to let you know, I wound up getting the Kindle, and just love it! It's easy to read, portable, and so far I've been able to get every book I've wanted (though I had to wait a couple of weeks after it hit the bookstores for one to become available). Plus, it has some functionality I hadn't realized: I can download some of my trip-planning documents--saving the weight of paper in my suitcase.
Thank you all for your input.