this is an old post, but wanted to write this in case anyone needs it
i have puked (vomited, barfed, thrown up) on my laptop. it was two years ago. the only difference between its functioning then and now is that i cannot run on battery power now, and i had to buy a USB sound card.
the right half of the keyboard/base and an area in bottom right of LCD screen (about size of a CD) was covered in puke. i (tried to) turn the power off, and set it upside down on a towel.
due to the amount of alcohol consumed, i promptly passed out.
waking up, i found the laptop was not turned off and was still running. woops...anyway, unplugged it, and proceeded to clean and disassemble the thing (not always in that order). i had access to another computer and found the service manual for my compaq presario 2550ca online. using this, i was able to keep careful tabs on what i was taking apart. i took everything apart/out of the case except the cpu/heatsink/fan and floppy drive. these were on the left/unharmed side of the laptop.
the keyboard was in very rough shape - and i bought a new one. i can't remember if i tried booting with it or not - but, i seemed to reason that it was a problem. so, i bought a new one on ebay. much cheaper than through compaq ($40 or $50 vs $90 or $100)
got keyboard back in, and it booted up no problem. the speakers weren't initially working either - today though, i did get some sound. so, i need to retake it apart and investigate. maybe missed something last time.
but, this was 2 years ago when i puked on it, and it's still working fine. electronics can be submerged in water, and still work after. as long as they're dry when supplied with power, it's not a problem getting them wet. i was unaware of that before this. also, q-tips and water proved helpful in cleaning. as did compessed air when the stuff dried out.
hope this helps someone sometime
greg