I agree with Luis at 250%!
Debian needs to have a marketing image for the desktop users.
I love the GNOME foot on the Debian swirl! Instead of the default
GNOME icon, this one would give some personnality to the Debian
distribution.
For the background, a lighter one could give to Debian a uniqueness
(like the maroon of Ubuntu) and a fresh image (unlike the maroon of
Ubuntu :)).
It brings another question... Should Debian choose one desktop manager
by default?
Personnaly I use GNOME and, the last time I've checked, when selecting
the "Desktop" during the installation, it installs both GNOME and KDE,
so I had to make my own installation (don't want two desktop manager).
The best would be to be able to choose one or both of them during the
installation. I think the fact to be able to choose what you prefer
symbolize the interest of the Debian distribution.
As said in anohter answer, a G/KDM theme should be found too.
And what about a grub splashscreen, that would be a little more
appealing too?
If some of these suff are already in the Debian installator, please
tell it to me. It makes a long time I haven't reinstalled my Debian :D
Thanks,
Creak