If you're looking to see just how much of a knob you really are, The Geek Test is for you.
I know some people who might score pretty high on this. Myself, I scored a 39.44773%, which puts me into "major geek" range, but comfortably out of the "complete geek" category. Anyway, it's a cool way to blow twenty minutes. [Who is this twenty minutes person? -ed Never mind.]