After using the D90 for a few days, I’m very impressed with it. Live view is a lot better than I expected and I really like having dedicated buttons for settings like white balance, quality, and ISO so I don’t have to keep going to the menu as I did on the D40x.
This evening I tried using it in low light and I found that it performs beautifully at high ISO settings. All of these pictures were taken when it was almost completely dark and without a tripod. I shot in JPEG and didn’t do any noise reduction or other processing.