how about this approach to full size folder?

[eddief]

a much simpler coupler than S&S and a dually articulated top tube. i bet Dave Kirk could snap one together in a few hours:

http://vimeo.com/35845538

[AngryScientist]

sweet idea, i like it. very simple.

[dauwhe]

It seems more complex than couplers, at least mechanically. Three breaks in the frame rather than two, hinges...

[dave thompson]

It's probably great for a commuter type or casual travel bike but with the 'slop' necessary for the hinges, not a good prospect for a more serious bike where frame integrity is paramount.

[ajz07]

sadly my work computer wont let me play flash, nor will it let me update the flash player (gotta love that).. so I cant so I cant see the video the OP posted. But I have always loved this idea/ setup:

Folding Concept (http://www.englishcycles.com/custombikes/folding-road-concept/)