This is the WiFi hat. It has a functioning WiFi detector built right in, showing you when you're in a hotspot. Well, more accuratly it shows people standing around you when you're in a hotspot. In order for you to see it, you'll need to take the hat off and look at it. Sure, not the smartest design in the world, but if you're looking for a hat that is far, far nerdier than your Star Trek hat, this is it.

Think Geek via Random Good Stuff