38. A computer-readable storage medium according to claim 35 , further including instructions for causing the one or more processors to perform the steps of: transmitting a plurality of invitation messages to the participants; and determining confirmation status of the conference session based upon response messages received from the participants in response to the invitation messages.
39. A computer-readable storage medium according to claim 38 , wherein the invitation messages are transmitted over one of a plurality of transmission mechanisms including e-mail, page, instant messaging, and Internet Protocol (IP) telephony.