Laptops and saltwater are tough. HOWEVER, we've had decent results with the following techniques (too late for the laptop):

1) Immediately remove power components (cords and batteries).

2) If it was immersed in water, immediately immerse it in RO/DI water or distilled water. Tap water is better than nothing. If you don't have a lot of RO/DI water, use tap water first, then rinse in RO/DI. If it just got superficially wet, do the same with RO/DI - try not to make the situation worse.

3) Separate components. Dry as completely as possible.

4) Place in an oven at the lowest possible temperature, for 24 hours.

Assemble, and fire it up. Likely casualties will be the screen, and if it got real wet, the hard drive. Success on phones and PDAs is about 80%. IF the power source is quickly removed.

Oh - and we have lots of Corrosion X around. I would not use it for this... or WD40.