Lia Bulaong's 24in48 project was a recent interesting social moblogging experiment. In a 48 hour period, 24 people in NY moblogged parts of their existence. I can't quite figure out if folks were given a mandate and/or if they had social connections, so the result is a bit opaque to me but a very interesting concept.
The grabber for me is that you can slice the results in multiple ways. The project only provides two, by person and by hour. All sorts of other whacky ideas get sparked in my head though. The images may have been GPS stamped. What about looking at the photos spatially distributed across a map of NY? If there are social connections between people and the photos somehow reify that, how about making the social network translucent in some fashion? A graph viz is the obvious first cut but there's got to be other interesting ways to show off the relationships.
Just thinking out loud.