Well here's what some guys off of SRO suggested :

hmmm.... is the motor locked? (will it turn over?). remove all the spark plugs and flush the motor with kerosene. turn it over a few times. drain the oil. flush the cranckase (again, u can use kerosene). probably will need a rebuild anyway. if you dont want it i will buy it! what year is it?

Accent_tuner

ever take a look at your brake rotors after you don't drive a couple days....they're all rusted and stuff right?....cast iron(which the block is made out of) can oxidize(rust) very quick.....i'm far from an expert on this, but i'd bet that if you got water down inside the cylinder, you're kinda screwed.....if the walls aren't too damaged, it might still mess up the rings when you turn it over...it might still run, but i'm sure the performce has been decreased seriously......

Sniper

no problem, but read this
A little moisture might make it hard to start, but you need to pull ALL the spark plugs out and crank it over a few times. Here's why. Like most liquids, water is basically incompressible. If you have a lot of liquid in one or more of the cylinders and you try to start it, the piston is going to try to compress, unsuccessfully, this water. Something's going to give and it's probably going to be a rod, the starter, or the ring gear.

Check the oil and make sure there's no water in it. Pull the plugs, spray a bunch of WD40 in there, chill for a few minutes, and then spray some more in. Crank it over. Put the plugs back in and you're ready to go.

After you run it, check the oil. If it looks at all frothy, change it.

I doubt you did any serious damage.

fast928