Here's a theme based on the Nexus One. Includes the usual stuff, battery, landscape, and password screen. Also included is an animated wallpaper. It's a little choppy due to the S2U2 size constraint of animated gifs. It's only nine frames but still looks ok. The zip file includes a gfx folder as well as a theme file.
As with all my themes, for best appearance choose Time Format "option 3", then edit the TimeFormat in the registry as follows: h':'mmt - Anything else and the clock may appear off center.