I don't see the surface low south of New Orleans, but it might just be that it's weak and undetectable by my eyes.
93L (The Bay of Campeche system) is intriguing, but will in all likelihood move ashore before developing.
The
The middle Caribbean circulation is very far to the south, but definately bears watching. I'd say just looking at it that it has the best chance ofthese three systems of developing, although I wouldn't put its chances any higher than 50/50 at this point, unless it were to move north in the NW Caribbean, in which case all bets are off considering what Dean did in that area.

Edit: Now I see the circulation south of New Orleans, but it does not look very tropical.