I got my Kindle 2 about 2 weeks ago! Glad I read this thread. I called and got my $40 credited!
So far so good with the K2. It's amazing to have so many books so easily accessible.
Here are some examples of how I've been using my kindle:
The power went out yesterday, I had two sick, sleeping kids. I got on my kindle and downloaded for free the sample chapters of several books I was interested in. This saved me money from buying paperbacks because there were a couple of the books I knew I wouldn't be able to get into reading. One that I enjoy, I was able to buy immediately and begin reading. Easy and convenient, especially since I was confined to the house.
Another feature I enjoy is being able to use wikipedia. I was reading a historical fiction book. I was able to use wiki to check out the "characters." That was really helpful.
The K2 is an excellent size and weight. Though with the K2 it is harder to me to cheat and try to skim to the back of the book! And even though it keeps a percentage account of how far you've read in the book, it's not the same as seeing the amount of pages to go. I read "The Other Boleyn Girl" and didn't realize I was getting myself into a nearly 700 page epic!
I love it. I'm just a recreational reader. I don't go on business trips. I know over time it will save money! Plus, as a friend of mine said to try to convince her hubby, you're helping the environment by not killing trees for paper! lol