id's Graeme Devine sent along an email to follow-up on the recent report that it was possible that some fix would be released that would allow the viewing of the demos of the matches recorded at QuakeCon '99. Here's the mail saying that unfortunately, this is not meant to be, though the good news is, it sounds like this is partially because such progress is being made towards completing the project:

No there will not be a special update for playing back the QuakeCon levels. We're in pretty much the final push now to get this thing out the door and we've started to make CD images etc. to test out the game, so another test is looking doubtful. I expect the next update will be the full demo, followed in very short order by the game itself.