Arduino Inspiration...

http://www.instructables.com/id/Arduino-Laser-Tripwire/

http://www.instructables.com/id/Arduino-Traffic-Light-Controller-wRemote-Control/

http://www.youtube.com/watch?v=LHLnw9Yt1rk&p=09141FA17CEDC930&playnext=1&index=3

REALLY REALLY COOL... I think:
http://www.youtube.com/watch?v=_H2Y_vSwmAE&feature=related

http://www.youtube.com/watch?v=qt_VmJljmKU&feature=related

http://www.youtube.com/watch?v=DIRebcf5_B4&feature=related


http://www.youtube.com/watch?v=I7CMI_imM68&feature=related

http://www.youtube.com/watch?v=hQhV601jIpg&feature=related