Other suggested themes - Get the Gnome Cupertino theme here:
sudo add-apt-repository ppa:webupd8team/themes
sudo apt-get update
sudo apt-get install gnome-cupertino-gtk-theme
or here:
http://gnome-look.org/content/show.php/Gnome+Cupertino?content=147061
Below are some of my favorite theme libraries:
deb http://ppa.launchpad.net/noobslab/themes/ubuntu quantal main
deb-src http://ppa.launchpad.net/noobslab/themes/ubuntu quantal main
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The GrayDay theme and can be downloaded here:
http://gnome-look.org/content/show.php/GrayDay?content=149310
The Elements-GS Gnome 3.x theme:
sudo add-apt-repository ppa:webupd8team/themes
sudo apt-get update
sudo apt-get install elements-gs-theme
Source: http://www.webupd8.org/2011/10/4-beautiful-gnome-32-compatible-gtk.html
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You can add the Elementary and Evolve PPA repositories below:
Then just search for Evolve theme from the Synaptic package manager.
sudo add-apt-repository ppa:webupd8team/themes
sudo apt-get update
sudo apt-get install evolve-gtk-theme
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To get the updated Ambiance and Radiance light themes
type the following on a terminal:
sudo add-apt-repository ppa:victored/light-themes-evolved
sudo apt-get update
sudo apt-get dist-upgrade
You can also go into Synaptic and search for "light themes" to avoid upgrading everything.
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The MAC OSX Lion "Mt.Fuji" wallpaper can be found here:
http://osxdaily.com/2011/02/24/mac-os-x-10-7-lion-fuji-mountain-wallpaper/