No personal experience, but in general Florida (esp. east coast side) has a reputation of being one of the very most cyclist UNfriendly states. Tons of people and their cars, elderly folks, and tourists who are unfamiliar with the roads. Driving to/from from a sailing class in Miami, we experienced a lot of "crazy drivers", extreme speeding, weaving, etc. There are probably decent places to ride in Florida, but I wouldn't count on Ft. Lauderdale being one of them.

You should check out the "Bicycle Friendly Community" lists here:

http://www.bicyclefriendlycommunity.org/profiles.htm

Davis, California is consistently in the top few. I'd love to live there!