I recommend buying ISkin which protects your keyboard from dust, spills, food crumbs whatever from touching the keys at all. I paid 2500 for this new MBP and I would cry if I by accident spilled something and I lost my investment. I have a clear iskin on the keyboard and it works great you dont feel no real differnce typing and its worth it because you know your keys are protected from anything getting spilled on them for me its piece of mind and taking care of the money I spent.
Wouldn't the coffee have just gone in thru your speaker grills?
I hate those iskins, they kill all tactile feeling in your typing.