This sounds good to me too! 5 people, easily! I say i know at least another 5 non forum members that would be game. As for Brompton. To be sure the Brompton is the finest design for heavy commuting/small folding. However i am not so crazy on the somewhat less stiff frame, the smaller and less common tire size and the need for a derallieur type thang. So personally i am more interested in BF clone suitable for long distance touring and a variet of gears though either would be great!
If we were to design the BF or Brompton clone i'd love to take a leave from the Swifts dropout as they make it suitable to all types of gearing and are beautifully engineered.