— Eflight 101

Flying boats and aircraft equipped with floats.

'Fly Electric' - Float Flying: A great article on designing, building and flying with floats.
$1.97 Floats - RC Groups: Step by step tutorial on building your own floats for a Slow Stik from foam board.
Skis and Floats: Float and ski builds and information. Lots of good info here.
Data - Free plans and great links on the web - RC Groups: Most of these are not electric, but this is a great list of plans and links to float planes and waterplanes.
Flying boat design - Ivan's plans: Flying off water is fun, but there are a couple of things you need to keep in mind when converting a plane to floats.
Fly RC - Make Your Own Park Flyer Floats: These simple foam floats are very easy to make in an evening and are suitable for many lightweight park flyer type models.