For the last hack of the season, I wanted to have something cool. So for AnvilHack II I set up my LEDs to be controlled via a webpage. We had it on our table during the entire hack, and moved it to underneath the screen for presentations.
The strip in action!
The patterns were pre-programmed on an Arduino which was connected to the strip itself. The Arduino received numbers corresponding to which pattern to use via serial. These values were sent from a Node.js server, which in turn received which number to send from the webpage, using socket.io, which was triggered by the buttons on the page.
ledctrl web interface
People seemed to like playing with them. Although a member of my team got so fed up with them flashing that he wrote a Greasemonkey script to continuously press the off button.