Caucus is a web conferencing system that can be used for both public and private discussions.
You access it via Netscape or other web browser and navigate just as you navigate web pages. Use your SFU Computing ID and password to log into Caucus. Here's some startup help . You can join the conferences that are of interest to you, and add them to a personal conference list so that Caucus will tell you, when you next connect, if there has been any new activity in those conferences. People don't have to be in a certain place at a certain time - you use it at your convenience.