Its amazing how many Mac laptops survive spillages. I took apart an iBook the other day to discover a puddle of something sticky had dried out in the bottom of it and there was corrosion on the logic and DC boards. Only issue it had was some non-functioning keys and a dodgy optical drive.
Saw a 12" PowerBook a while back which had a glass of Baileys (Irish Cream) poured through it. The keyboard was tacky to the touch, but the thing was 100% functional. Amazing.