Random notes about my research project: I like this this "location matters" motto. The point is that even though IT modified how people carry out social activities by removing the notion of distance, space and location are still important features in terms of collaborative problem solving. "Location matters" relies on the hypothesis that people use location information in collaborative problem solving: knowing where the parters are can improve collaboration in terms of:

division of labor among the group (A goes there on level2, B goes here on level1 for instance)
doing inferences about others activities (past: where you have been can attest what you done, present: if you're at a specific point you may do something, future: heading in that direction can mean that you will do sth specific)
doing inferences about others' availability (A is in X then he may be busy)
building a shared understanding of the situation: having a map of the environment with potential actors' positions
re-shape communication and help referential commmunication: being close to an object you're talking about helps the others understanding that you're making reference to it

All of this relies on a "belief system" in which actors may/could assign meaning to people's actions based on location information. I would like to have a model of this (a probabilistic model?).

(thank you Hillevi for making think about it, now I have a clearer description of what I thought)