Methods for operating a meeting coordinator to detect which participant is speaking during a teleconference meeting using a teleconferencing system, having corresponding mobile electronic devices and computer-readable media, comprise: accessing calendaring information concerning the teleconference meeting, the calendaring information including a time of the teleconference meeting, a meeting location, identities of meeting invitees, and contact information for the meeting invitees; automatically setting up the teleconference meeting using the calendaring information to enable the teleconferencing system to connect remotely-located meeting invitees; generating a roster of meeting participants comprising at least some of the meeting invitees; tracking a participation status for the meeting participants; and accessing prerecorded unique digital voice signatures for the meeting invitees.