Happy Pi Day! Celebrate! Eat some pie, do some math (I know which I'm going to do). Vote for some slashy, slashy pairings, which have nothing to do with Pi or Pie, but it's Slasherday, so there you have it.

Before we get to today's matchups, yesterday's smackdown between cavemen and astronauts ended with the astronauts in the lead (there's always time to redeem those cavemen, though!). And tomorrow I'll post the amount we've raised so far during March Madness. (Ooh. Guess I'll be doing some math after all.)

And now:

Slasherday