I've had two recent keyboard spills. One Mt. Dew on a Logitech MK320 (with drainage holes), and one (olive juice - don't ask) on a wired Logitech keyboard without drainage holes.
In both cases, I just ran the keyboards under tap water for like 5 minutes. (after removing batteries!)
I had to let them dry in my dish rack for a complete week though. After 3-4 days the wireless keyboard was still unusable.
Edit: After a week drying out, after being thoroughly rinsed, they both still work fine.