You can easily search thousands of properties on Yahoo.com. Buying "off-plan" in Florida - particularly now - is bonkers.
Some houses in SE Florida are currently selling for below construction costs in very nice areas. If you have access to a US mortgage and convert Euro to $ now it mightn't be too bad an idea if you can spend the time to research and buy right - particularly from those that cannot currently afford their mortgage.
My father (who has a real estate license but only to sell his rehab houses) told me of a property down the canal from him that cost approx $175K construction costs to build, on property that would have cost the buyer $90K if they'd purchased immediately before construction (they didn't) and which they added a seawall worth $15K. It is listed on the market for $195K, and it could probably be got for less if offered. I'd buy it if I could afford to rent it out at an attractive rate (you'd definitely have a negative payment now). There is a glut of unsold properties at the moment, but in spite of the property slump and the hurricanes, people are still moving to Florida.
If you can weather the storm, I think it's a good medium/long term investment area, but if you're after a quick win, look somewhere else.
-J