I really, really love my Kindle
I even forget that it's not a book (I have the cover, so I hold it just like a book), and once or twice I found myself trying to click a button on the side of my paperback to turn the page.
Just one caveat - don't get textbooks on Kindle. I am taking the free Stanford Artificial Intelligence course, and I bought the kindle textbook to save money. I can't read the formulae, you can't flick to the tables and back to the text - never again. I can read the book perfectly well on my PC kindle app, but I don't want to read there.
I have the 3G keyboard. I don't like the idea of the touch and wonder if it interferes with the e-paper effect, which is the main benefit of the kindle.