That's the one buddy - it was a quick google search - I couldn't find a picture of the plaque. I've been planning a trip down there for a while, supposedly great fishing b/c it's so far out there. Sea Planes are $300, but I would like to make the run in a small boat.
I think E just did a special on Ft. Jefferson as an "out of the way" paradise.
I'll take a picture of the plaque and post on FR when I get down there.