This is pure genius. It's a hoodie that's just got a seemingly ordinary giant hand on it when it's zipped up. But zip it down a bit and suddenly you're giving everyone around you a mega-sized Vulcan salute (and transforming into a big geek ... but you already knew that).
It's called the "Traditional Greeting," and it was designed by Paulo Bruno. It'll run you a logical $40 at Threadless.