12. The method of claim 11 , further comprising: establishing an actor heartbeat based on an activity level, the activity level differentiated between the modalities of communication.
12. The method of claim 11 , further comprising: establishing an actor heartbeat based on an activity level, the activity level differentiated between the modalities of communication. 15. The method of claim 12 , wherein the modalities include: telephone, instant messaging, calendar, in-person meetings, creation of documents, and editing of documents.