Messing around with CompizConfig the other day and discovered a nifty tweak: blur your transparent terminal windows!

To do this you need CompizConfig installed:

sudo apt-get install compizconfig-settings-manager

Once installed, go to System > Preferences > Advanced Desktop Effects Settings. Scroll down to Effects and enabled Blur Windows. Then click the Blur Windows button to open the configuration panel. Set “Alpha blur windows” to (class=Gnome-terminal), Check Alpha Blur, set “Blur Filter” to Gaussian, and set “Gaussian Radius” to 9.