It looks like the Wind Creek Casino blimp from Atmore, Alabama. It was flying over Perdido Key a couple of weeks ago.
Whoo hoo I was at least able to make out a "W" off of it as it went by! They'll need to come down a little closer for those of us with contacts -smeared with sunscreen- trying to read it. Ha. :roll:

SLOT SLUT, here!atmore alabama - Google Maps
How far away is that casino?SLOT SLUT, here!
