Don't deny it -- at some point, you watched Star Trek and wondered when you could simply slap a device on your chest to speak with your crew. You won't have to wait hundreds of years, thankfully. OnBeep has just unveiled the Onyx, a clothing-worn communicator that lets you chat with groups just by pressing a button. The Bluetooth add-on lets you securely message up to 15 people once using your Android phone or iPhone as the home base; you can also see where they are and whether they're available. The saucer-shaped design isn't nearly as discreet as Captain Picard's badge, but it's light and won't wreck your favorite shirt.