This Montague Boston singlespeed belongs to a guy named Mark Scott, who decided he couldn’t leave his bike in stock form. Normally, I wouldn’t give a folding bike a second thought, but Montague seems to know how to do it right, and this particular modified version looks good enough to use as a primary ride.
I may have to look into getting one for myself someday, for use as a travel bike (sure beats shipping it or paying $100 or more to take it on a plane). Now that I know they can be modified to look pretty sweet, and they fall into a reasonable weight category (24lbs stock), it’s definitely on my list. In fact, I wouldn’t be surprised if I could get one under 20lbs.
More info on Mark’s bike can be found here, and Montague says the quick-release skewer can be replaced with a lower-profile bolt-on, for those of us who wouldn’t want that metal handle so close to our junk.