This frosted glass Orb slowly transitions between thousands of colors to show changes in the weather, the health of your stock portfolio, or if your boss or kid is on instant messenger.
<img src="http://www.ambientdevices.com/images/orb01g01.gif">
Cool idea...there is also a pen that changes color as well...I wouldn't pay for the $300 price tag though
http://www.ambientdevices.com/cat/applications.html