Audionet provides a useful directory of offerings. The sound quality is improving with each new release of RealPlayer. Video is a little choppy over dialup connections, but works really well on high-speed campus LAN connections. Microsoft NetMeeting is a very interesting conferencing package. Supports audio calls, chat window, sharing applications, whiteboard, etc., over the Internet with other NetMeeting users.
Sound quality is pretty good.
You must have a multimedia PC running Win95. By the way, video cameras for the PC don't have to cost a fortune. Help Desk McGill is an international university whose main language of instruction is English. Located in Montreal, Quebec, Canada, McGill's 22 faculties and professional schools offer over 300 programs at the undergraduate, graduate and doctoral levels.