Oh boy - I'm about to throw ANOTHER bike into the mix:

http://www.foldupbicycle.com/Newbike.htm

Thanks to "Chop" for his webpage featuring every folding bike manufacturer known.
I'd never seen those ones before - I'm still going through the list on Chop's page.

Another that looked interesting, along the lines of the Handybike: http://www.17bicycle.com/