8. The system of claim 7 , wherein the context of at least one of the parties is influenced by at least one of a cost of interruption and a cost of deferral of the communication at a future time.
8. The system of claim 7 , wherein the context of at least one of the parties is influenced by at least one of a cost of interruption and a cost of deferral of the communication at a future time. 9. The system of claim 8 , wherein the cost of deferral is influenced by at least one of: an identity of a party and one or more stated or sensed communication goals.