As you may have seen, Google took the covers off Gingerbread today and released the new SDK, which allowed me to immediately jump into an emulated Gingerbread instance. After playing with the new UI for a while, I've taken a bunch of screenshots, which you can find below, along with some of my notes.
Before I dive into the Gingerbread screenshots, here is a side-by-side comparison of the same Settings screen in Donut (1.6), Froyo (2.2), and Gingerbread (2.3):
From left to right: Donut, Froyo, Gingerbread
As you can see, not much has changed since Froyo, except for most of the elements getting darker and/or greener.