I suggest erring on the side of caution. Obviously there's a chance, almost a certainty, that the keyboard isn't the only thing that got doused with OJ. I'd take that puppy apart and clean it, or have a professional service do it. Even though it's working okay for now (And you were lucky.) there's no reason to assume that the residue from the acids and sugars in that juice aren't sitting on the motherboard doing a job on various components.
Next time you spill something through the keyboard of a notebook computer, unless it was de-ionized water, don't just let it dry out and then restart it. You can blow away a lot of money by doing that.
- prosaic