I just wanted to let you know, if you don't already, that the Goalball list at YahooGroups.com is a great resource, with Goalball players, refs, coaches and others, from all around the world. It's the best Goalball resource I've found yet! You can join this e-mail discussion list by sending a blank message to:
Goalball-subscribe@yahoogroups.com
Other than that, well, there's USABA, which is the United States Association of Blind Athletes, at http://www.usaba.org. They know tons about Goalball and put on sports camps and events all around the nation, all year long.
Lastly, I know I've seen the link on Google, under Sports, Blind, Goalball... for the Florida School for the Deaf & Blind, so I guess they have a team. But if I remember correctly from my days living in Tampa Bay, they are located in St. Augustine. That's hardly SOUTH Florida, I know, but, they might be able to point you to more local resources/people.