I built a camera like that out of wood a couple years ago. It uses gears on the inside to pull a regular roll of film through and expose it through a narrow vertical slit as you rotate the whole camera on its center axis. It's sort of a broad-stroke photo. http://nnife.com/d/?dimension=33

Here are a few shots that turned out decently: http://nnife.com/p/?dimension=20 These are just film scans. You can by the light bars see on the photos that it was very hard to rotate the camera at a constant rate.

You can also see that as I went with/against the traffic, cars were elongated or shortened. Really interesting phenomenon. I was working on this with a painting teacher at the school I go to, whose fascination with unconventional forms of photography got me interested as well. Unfortunately I was a woodworking noob when I made it so its success rate was too low for me to keep using it and I never took many more photos than that.

If I ever get around to building a better version I want to try an idea he had: mount the camera in a spot and expose it over the same piece of film at three different times of day using red, green, and blue filters. That would add another level to emphasizing time in a photograph.

The teacher I was working with is named Nicholas Evans-Cato. The experiment started off as just one to make a film panoramic camera. You can see why he'd be interested in that if you look at his work. http://www.georgebillis.com/artists/nicholas_evansCato.html

I'm sure it's been done before, but it was a really fun experiment. Changed the way I think a little bit.