Check this video on Youtube

http://www.youtube.com/watch?v=4eDOZ1fVhEw

It is a wireless brake & turn indicator for motorcyclist helmet.

 

ohhh.... really cool.... wireless break and the indicator is really nice....

 

I was wondering if this is possible. If I can turn on/off wireless feature on a router on the fly. I would like to do this b/c I am considering getting a wireless router only b/c my gf wants to access the web on the laptop in our room while Im fragging on my pc . but if she wont be using the laptop, I would like to turn wireless off. any input/suggestions? thanks.