@aral Very cool - I remember that!
Now you've reminded me of the hybrid Cybermind Conference I ran in 1996! We used a MOO for the online interactive space (which was visible on a side screen at all times), and streamed everything from the main venue on RealAudio and CU-SeeMe!
https://web.archive.org/web/19970111210006/http://www.curtin.edu.au/conference/cybermind/