I still need to jot some thoughts about using the Kindle, but a quick note from traveling.
I downloaded 3 or 4 free books, classics, before I left, and I was glad since I finished one I'd bought and Sprint didn't have good connectivity in the Houston airport. Actually I was already on the plane and couldn't get wireless there. I liked the fact that I was forced to read some things I wouldn't have necessarily packed. I started "The Count of Monte Cristo", which I'd always heard was a good story, but wasn't likely to pack in my suitcase. It's interesting, though slow. I have to read a chapter or two at a time.
At the conference today, a business conference, I was listening to people talk and I had a few things recommended by various speakers, either their books or others. So while sitting there I looked them up in the Kindle store and grabbed samples to read later. The samples give an OK idea of the writing and they've let me pick a few books I want to buy.
Definitely there's a danger of spending too much $$ with this thing.