I read an article about this in the New York Times the other day. You can see the article here:
http://www.nytimes.com/2009/05/07/te.../07kindle.html
The part I found interesting was the bit about textbooks on the Kindle. In the NYTimes article, the Government Accountability Office estimated that the average university student in the United States spends about $900/year on textbooks; the textbook industry contends the figure is closer to $650. Based on my experience, I'm going to go with the GAO's number. University textbooks are expensive! Suffice it to say, if the Kindle made them cheaper, I would be all over that in a heartbeat. I'm pleased to hear that three major textbook publishers have already agreed to release texts for the Kindle.
I would love to have a Kindle. It certainly wouldn't stop me from buying books; I love the physical feeling of a book. But like the iPod, I like the idea of having lots of books at my fingertips, in a device I can carry around with me.