Forbes.com is running a story about Vocera, a company that has developed a Star Trek type communication device, and we're not talking about those lame 1980's mobile phones Kirk & Co had.
According to the press release, Vocera have the system up and running in their office, and it , uses VoIP for transmission. You just tap the badge & say the name of the person you want then away you go, until some erects a level 5 force feild, or whatever...