Twice, I've a mamiya 7 with 43mm lens and done some 'street' work with it, most things, obviously failed, but a few things worked.
I set the exposure to auto, used f/8 [which has a lot of DOF on the 43mm], pre-focused about 10 feet away and tried to anticipate,
some of the better results:

http://www.flickr.com/photos/stormiticus/4892893858/
http://www.flickr.com/photos/stormiticus/3265465414/
http://www.flickr.com/photos/stormiticus/4881463122/

-Tim