Thermaltake Gamma Pad and Steelpad S&S Mousepads
 

Pressing a small button in the top surface of the Gamma Pad causes it to spring to life, glowing in your choice of seven different colours (blue, red, golden, purple, light blue, pink and green), or a mode which cycles through the seven colours while you sit in amazement, presumably. The guys in the office liked to think of this as disco mode - without the mirrorball and flares.

Review Link:
http://www.overclockers.com.au/article.php?id=315291