I couldn't help but giggle when I saw the Geek Clock ($25). This novelty wall clock includes an equation or equally geeky symbol for each number on the face of the clock. My favorite: 3! for the number six (three factorial; 3 x 2 x1 = 6). Its retail page on Uncommon Goods contains a "cheat sheet" to understanding each number — a similar sheet is included with each clock. I think this clock is a funny conversation piece and the perfect gift for a true geek! What do you think?