Recently, I got a Kindle. I'm not quite ready to abandon paper books, but I love the ability to read PDFs on it. I have a ton of PDFs on my computer which I don't want to read because reading on a computer is very tedious. However, its much easier on a Kindle because it doesn't strain your eyes anymore then reading a normal book does.
The other thing I like about it is the large amount of books which are either free, or less then two dollars. Most of these are classics, like the Iliad, and are still a lot of fun to read. Because of the free wireless, you can download one of these free books whenever and wherever you want, which is really cool. In a month or two, I'll probably have made up the up front cost of the Kindle by buying these cheap books.