Everybody knows nerds love pizza, so it's a little surprising that this took so long: presenting, the Star Trek pizza cutter. As you can see from the picture below, it's a pizza cutter in the shape of the U.S.S. Starship Enterprise:
This particular gem comes from the folks at ThinkGeek.com, purveyors of all sorts of nerdly novelty items (i.e. the Tauntaun sleeping bag and the Ladies of Star Wars playing cards). It's only $24.99 and will make a nice counterpart to that Klingon cork screw you've got.