Did not see very much in the FL Driver's Handbook about roundabouts.
http://www.floridatrafficacademy.com...ok_chap3.shtml
There's also a FL Department of Transportation (FL DOT) "Roundabout Guide" but that covers more why communities might want to get them rather than how to drive in them. Check the Document Library in the FL DOT if you want to look at this "Roundabout Guide".
http://www.dot.state.fl.us/TrafficOp...oc_Library.htm