I built a new CheerLight for 2012 dubbed the CheerLCD!
The idea is if you tweet to @cheerlights with a color, it'll change the color of my CheerLight (and everyone elses too!)
I built one in 2011, but here's the new one for 2012.
I used a USB+Serial Backpack LCD Display and a 3D printed stand. The device connects to a computer that is running a simple Perl script.
There's more info here:
And it was also mentioned on the Adafruit Blog:
And the 3D printed stand was a featured object on Thingiverse: