Interesting point.
I'm not going to be using a communter train or bus but it would be nice to know that the size wouldn't hinder me if did need to use some public transport.
I think on the whole we may struggle in this department. Biomega have a concept bike called UM (urban mobility) that folds up pretty tightly but it looks like we won't see them in our parts until after Christmas, and its top of my budget £500.
I'm not interested in anything that needs wheels removing. I want a 30 second fold tops.
I'll check out those sites and keep you posted on my progress.