There's talk of these bikes in the Folding Forum if you look around.

I think they are really interesting. Dahon made (makes?) a model that they equip with moustache bars, I think it came with leather grip tape and brooks saddle as well. Bianchi, as was mentioned, and a Japanese outfit called Tyrell who make lightweight racers. The dahon model is built to become thin, with folding pedals and a quick release handlebar clamp that allows the bars to fold in plane with the frame, so you can squeeze it into a very thin space for storage.

That Masi seems to have some pretty substantial wide tires on it, maybe to even out for the small wheels in real world (pothole) conditions?

But yeah, if I was going that way, I'd probably get something that folded anyway, like a Xootr Swift or a Pacific Reach.