Ubuntu 10.04 is approaching to the final version, and screenshots from the official theme are already here. Below are two screenshots which will be present in the final release, available in both a light and a dark version.
It looks pretty nice, and I'm sure that the final release is going to be an extremely good one. Below is a video of boot splash video.
This screenshots are not mine. I've just updated my Ubuntu 10.04 ran through VirtualBox, but it keeps displaying me error messages (during boot and shut down), and I didn't get the new theme yet.