this is related...here's a guy with a blog called video haiku. He gives himself rules-- length of clip, ambient sound to capture the vibe of a place:
http://blog.videohaiku.com/
Lots of these are based in the Twin Cities, but he has some from his travels around the world. He is in the process of changing up his daily visual challenge, and I am curious to see what he pitches. those of you with cameras can play too.