Hello,
Here is the last pic I had posted:
Bigger here:
http://meets.free.fr/debian/images/obubuntu-RC8-menus.pngand it comes from the Blubuntu-wallpapers package.
The very latest Ubuntu Openbox Remix has Bento for name, although it is not yet your Bento artwork in it.
If you have spare space and want to test, it, and why not perhaps work directly in it, it is here:
http://tyruiop.eu/~melodie/Downloads/ISOS/UbuntuI have tested it in Virtualbox, while I had installed RC7 in a T30.
I had done RC8 since, and this one redone several times. A glitch : volumeicon has gnome-alsamixer while it is alsamixer-gui which is installed. And it is up to date, with a CD burner added.
If this color suits you as a basis, this is fine for me. The Blubuntu wallpaper sits in /usr/share/backgrounds and is only 1600x1200 as a size. You might need to start from scratch, even if you decided to take it as a first idea ?