Re: my kitten is drooling!!!
My cat drools when she is extremely stressed out (i.e. vet or car rides) but it doesn't seem like this is the case.
I knew a cat once that would drool a lot when given silvervine powder (or matatabi - the Japanese equivalent of catnip). If your cat seems normal otherwise, and is eating well with a normal activity level, I doubt it is a cause for concern. You could give your vet a call and ask though, just for peace of mind.