No, there aren’t. I didn’t bother putting up screenshots because I don’t use the default Ubuntu environment. Which means that any screenshots I might have given you (or for that matter, would ever give you) would have been customized Openbox builds and wouldn’t look a spit like a default Ubuntu desktop.
But if you’re roaming the Web looking for some glimpse into the future, check out the Ubuntu 7.04 Alpha 3 screenshot sequence on LinuxQuestions.org. All things Gnomey are illustrated there.
(And honestly, people: It’s a Gnome-based desktop. It’s pretty, but did you really expect it to look all that different? Or were you just hoping they’d drop the brown color scheme? 😆 )