Aerocool Chameleon Fan
 

A fan is a fan is a fan. That is what is used to be at least. Before the days of lights and UV reactive dye, you had to only be worried about sound and size of the fan. Today's choices are more numerous then ever. Not only do you have fans that glow or light up, they can give you an indication of the temperature in your case. Aerocool's Chameleon fan does just that in a cool way (no pun intended).

Link: http://www.aselabs.com/articles.php?id=173