If you're not worried about voiding warranty (which you probably did by spilling Coke in the first place), see if you can remove the entire keyboard assembly. Then go to a drugstore and buy the highest percentage alcohol you can. Don't get the ordinary 70% Isopropyl rubbing alcohol -- you want as close to pure alcohol as you can get, like 91% or 99%. I know Wal-Mart here sells 91%, but if you can find higher, get it. The lower percentage stuff has moisturizers in it for use on skin so you don't dry out as much, and that leaves a whitish film behind.
Get a shallow pan or basin that the keyboard will fit in, and pour enough alcohol to completely submerge the keyboard. Depending on the size of the dish, it might take a lot of alcohol (more than a bottle, if you bought a small bottle, but alcohol is cheap).
Let it soak overnight at least. The alcohol is a mild solvent that will dissolve and loosen the soda residue and most other organic residue (like crumbs). If your keyboard was dirty, you'll find all sorts of gunk floating in the alcohol the next day. Then remove it from the alcohol, shake out the excess liquid, and let it sit for another few hours to evaporate the rest of the alcohol. You might blow dry it with compressed air to speed things up. Reinstall and give it a try.
I've used this trick more times than I can remember to recover electronics like cellphones, cordless phones, and TV remotes. It also works for devices that have fallen in water provided you got the battery out before major electrical damage occurred. The alcohol displaces water, then evaporates quickly, leaving the device totally dry. In every case I can remember, it worked and the device was saved.
*DISCLAIMER* Although I've had great luck with using alcohol baths to recover a variety of electronic devices from dunks and spills, of course I take no responsibility for whatever might happen with yours. Unless it works, in which case I take PayPal.
Seriously though, I can't imagine it not being fine, but the risk is yours!
Problems? See this thread at archive.org.
