Can anyone tell me what the three pedals on the piano do?

I know one is the "damper" which kind of muffles the strings to give a quieter sound. The far right pedal is the "sustain" which helps carry the notes over measures. That's why you'll see piano players kind of "pumping" that pedal, because they want the chord to sustain until the next chord. I don't know what the 3rd pedal is for.

The right-most pedal is the damper pedal. Normally you press a piano key and the string vibrates, then stops when you lif your finger off the key because the damper goes back down onto the string. The damper pedal lifts all the dampers away from the piano strings, so that they keep vibrating instead of stopping when you lift your fingers off the keys. The middle pedal does exactly the same thing, but only for one damper. So if you play a single note and press the middle pedal, only that note will keep vibrating. The left-most pedal is the soft pedal. It shifts things to one side inside the piano, so that instead of striking all 3 strings that go with each piano note, it only strikes 1. This means everything sounds a lot softer.

Also I found this: http://en.wikipedia.org/wiki/Piano#Pedals

Simply, right foot on right pedal for loud and sustaining sounds; or left foot on soft pedal to dampen sounds.

Middle pedal ; "The mysterious third or middle pedal is usually the "sostenuto." When you press down a key or keys, then depress the sostenuto pedal, it will sustain those notes--and only those notes--until you let the pedal up. This allows you to play a note in the bass, for instance, and then move both hands up to the treble for a few bars while the bass note continues to sound. In effect you have an extra hand to work with. But it's the sort of thing you only need with keyboard-spanning music like that of Debussy or Ravel. For the average Saturday night tinkler, two pedals will do just fine."

Op sit: http://www.straightdope.com/classics/a2_405.html

If you take piano lessons for long enough (10 yrs,say) your feet get muscle memory like your fingers and wrists do.