Jetavia:
No, the company went under in 1985.
There is however another similar operation called Seaborne.
Last time I was down there (March 2001) they flew Twin-Otters on floats between STX and STT.
Heard a rumor that they went Tango Uniform, but not sure.
Another guy is starting a "Ground Effect Vehicle"
operation there in a month or two.
He is looking for drivers for the flying boats:
6 seater funny looking craft with a pod engine and pusher prop. Short stubby wings that will fly the thing at about 10 to 20 feet over the drink at 100 miles per hour.
He is looking for folks with both sea plane and boat experience. (The job requires a US Coast Guard skipper license as the FAA won't have nothing to do with it..

)
I got a call about the job and was tempted to do it, but Mrs. TowerDog won't let me quit my flying job to go on another adventure. Moral of the story, don't get married....