Sucks dude.
Power it off, take out the battery, don't use it for a few days. put it in a large bin filled with uncooked rice (rest it on top of the rice). The rice will help to absorb the water.
You can use a hairdryer first as well.
Don't turn it on for a few days..... let it dry out.
You may be screwed though.
Oh, and in the future, don't drink water near your MB.
Good luck...