From the people that brought you Highlander and war driving, here’s a way to freak someone out by sending them an anonymous Bluetooth mobile message. For best results, target a crowd or mobile shop where you’re more likely to find another Bluetooth-enabled phone:
http://news.bbc.co.uk/2/hi/technology/3237755.stm
I’ll have to wait until I can get a better phone before I can do this. Should be fun.