http://www.flickr.com/photos/rfischmann/565870194/in/set-72157600001100081/
i dno if this is the photo they use in the latest developer preview..coz this site is in spanish or something. but im thinking it is..and no one has posted pictures of the latest build yet. could this perhaps be it? what u all think?
Except you'll notice it was uploaded in June 2007 - I think it's simply the background for Time Machine, but I could be wrong. I would have no complaints if they used this as the default. In fact, I really like it!