Nerf

Hey this is a good robot when someone is bugging you hid this somewhere secretly control it and fire! LOL
Could be used as a robot guard too. :)
http://www.youtube.com/watch?feature=player_embedded&v=C95VP4Tzmpg

Awesome!!! Job helper

This is a robot that helps a company teat its touch screens.It's called stress testing, and apparently the robot is swiping at the screen (like your finger or a stylus) and seeing how the screen holds up to the abuse. (It's also testing the built-in light sensor on the tablet's screen, but be sure to watch the video so you can see how a non-LEGO part is performing that duty.) Maybe someday mindstorms will help you too!
http://www.youtube.com/watch?v=89fIXSyzw5g&feature=player_embedded