Where can I rent a float plane? Is it possible to rent a float plane with a private pilot's license?

Flying floats is one of the main attractions for me to learn to fly.  However, after some searching on the internet I can only find wheeled aircraft that are available for rent in my area.  Am I missing something?  Are there flying clubs or partnerships that have float planes available?  I would love to fly floats but owning a seaplane is not in the cards for me at this point in my life.
The Seaplane Pilot's Association publishes a Water Landing Directory that includes seaplane facilities and flight planning maps for cross countries. This lists facilities that offer seaplane rental's. There is a discounted price on the directory for SPA members.