Just in time for the NFL playoffs is Fan Light, a wrist-worn LED blinker that alternates between your team's two fave colors when you shake your arm, notifying the opposing team's fans that you're far geekier than they'll ever be. Of course, Fan Light maker FoxFury would like to see a whole stadium full of these babies blinking at full tilt, but there will only be limited quantities of these little $25 flashers available until their official release in six weeks. That's just in time for what, the Final Four? For now, the only colors we're going to be needing are green and gold. Playoff trash talk will now ensue in the comments. [FoxFury]