To stream 200 simultaneous video streams at 20 KBPS, you need to have 4000 KBPS of bandwidth. If you are lucky you are on a campus network with lots of headroom, if not, check prices in your area. Connecting all the components is pretty easy after you get everything set up. If your Real Media server is running you can start to stream media from your encoder to your server for web distribution. Audio content is similar to radio or audiotape content, if the content is comprehensive and has value then it will probably work as a live or archived stream.
Video is another matter.
If your class or information needs to have a lot a high-speed detail, for example a brain surgery class, I would not recommend a 320 X 200 28.8 video stream. But many classes are talking heads with simple graphics and notes, which translate and compress nicely in this format. Dr. Kendrick even plays real audio and video files in his class, like the BBC world market reports, Bloomberg news or Weather Channel forecasts. After doing a couple of classes for a semester, convergence of media took on a new meaning. Usually I use this term to describe the blending of computer, newspaper, television and other media forms together from a techno-hardware point of reference, but in this case it started to affect the way I did my daily work.