The Fabian bike has cables running through the frame which comes out level with the handlebars. the brake at the back is also at the base near the pedals. The frame could cover the brakes at the back for protection from vandalism.
Collapsable handlebars by Joe Wentworth. The handlebars collapse down for better stacking but they also have a locking mechanism within the ends of the bars so you can lock the handles together when folded and no one car rise away with your bike.
This information was found on "who sells it.com" regarding the bike friday folding bike. Interesting to get an idea of the off the shelf items available.