Cary,
I've got one over in Atlanta. I think you'll find that there are several (3-4) down in Tampa and another several up in the Chesapeake.
Amy and I were looking at moving over to the F18 this winter, but have decided to stick with the F16. As a whole, I'd say the F18 is a stronger class in the area. However, I'd go F16 if you think you'll find yourself sailing alone sometimes.
And the F16 is just crazy when it's blowing!

Amy and I are aiming to race the cat a bit more this year, but the J/24 will continue to be our primary boat. I'm guessing we'll get over in your neck of the woods for Tommy Whiteside...and may hit some of the smaller regattas before then.
Jeff.