[Design-team] Updated desktop background survey

[William Jon McCann]

Hey,

I have updated the desktop background survey I started last year with
some of the artwork that has appeared in the meantime.

http://www.gnome.org/~mccann/art/State%20of%20the%20Art%20-%20Wallpapers%20-%202009-08-07.pdf

Additions:
 * Windows 7
 * Palm Pre
 * Andriod SDK
 * Ubuntu (2)
 * Fedora (2)

Hope you find it interesting.

Thanks,
Jon