Like wow man....give me a hit of that stuff.....I've always loved the look of the flying boats. I wonder if there is any chance of seeing one of those again from Boeing. It isn't a bad idea for a future Boeing Superjumbo. THe problem with A380 sized planes is getting them in their parking spots. The 380 wings clear by mere inches. One way to go around that is go outside the airport and have your superjumbo take off on water.
I saw this in a Popular Sciences article a little while back...it was an upscaled 747 fuselage with two normal 747 fuselages attached as the floats. Really strange design, but still really amazing.