I put in the pre-order tonight. I have a Kindle 3 keyboard that I use a lot with the case w/ light. I would like a lighter and more compact version, case and all, and I do reading in bed at night so a better light is also desirable for me. The original Kindle 3 is a very small device, but the case makes it a bit bulky. I found though that I really do not use the keyboard that much except when I play around with the web browser. I'm also going down to the Wi-fi model as I find I no longer make much use of the 3G and keyboard. I normally do not pre-order products, but I use my Kindle to such a high degree I am willing to splurge on a new model as my Christmas present.
Someone mentioned that the light was always on, I did not realize that until I looked it up and found that in a USA Today article. However, Amazon still claims the same battery life as with my Kindle 3 sans light.