The thing I'm enjoying most about the kindle is that many authors who simply don't get picked up by the big publishers are choosing to self-publish, and those books are only available in some e-reader format (mostly kindle, as Amazon apparently makes it incredibly easy to self-publish). I'm finding some that I really enjoy that I would have missed if I was limited to paper books.
You really don't have to buy a kindle... I've found that even though I own one, I still mostly read on the computer (either at a desk on the flat screen, or laying in bed with the warm laptop on my chest).
Amazon has a free "kindle for PC" program that you can download (which I have), but I don't even use that any more... the latest trick is "kindle cloud reader" which opens the book you're reading right here in the web browser. All I do is keep my current book in one tab of my browser all day so I can flip over to it when I have a few minutes. When I go home to my room at night and open the 'net, the book synchronizes to the same page I was already on, and I pick up right where I left off. Very handy, and very free!
What did you think of Amos Walker, by the way?