Compiz Fusion allows you to use advanced desktop effects such as the rotating cube desktop and some other pretty appealing eye candy.
sudo apt-get install compiz compizconfig-settings-manager compiz-fusion-plugins-main compiz-fusion-plugins-extra emerald librsvg2-common fusion-icon
Then run Applications -> System Tools -> Compiz Fusion Icon. A blue icon will appear to the tray. From here you can configure Compiz-Fusion.Tweet