Yes, my wife and I have kayaked around aligators in Georgia freshwater areas on occassion with no trouble (so far), but it makes me nervous when the aligators decide to slide down into the water from the bank just as we are passing by them. Sometimes they follow us for a while and then dissappear. Kind of scary... I think we need a bigger boat.
We also seem to have alligators that hang around in saltwater areas, even in at the mouth of the Atlantic Ocean. Maybe that's normal, I don't know. I never thought that sharks and alligators could share the same habitat (with the exception of the Bull Shark).