geeky
ataniell93 reminded me of the Pizza Arbiter, which is useful for if you ever want to have pizza with me. This would be more useful for large groups, of course, if you could specify a number of people to share one pie, and it could sort for maximum compatibility (which might be a traveling salesman problem, but it could make a decent guess), but it's a decent tool if you have a small crowd with similar tastes, or you don't happen to remember your buddies' tastes offhand but they've got them stored.
I need to poke
figment0, dustraven, and 
trysan_laryssa to enter their preferences over there, to make figment0's pizza-ordering experiences easier. 