I've been experimenting with a wallpaper after reading a thread on the new look for Ubuntu that will be implemented in Hardy Heron (Link to thread).
I also plan on making my first theme to go with this wallpaper, and will probably upload it as a complete package on gnome-look.org
So, basically, what do you think?! I've uploaded two versions, a 1280x1024, and a 1440x900 for widescreens.
and the 1440:
EDIT (Nov 5th): Uploaded the initial release of my theme here.