Certainly presenters have no control over this, but could you please pass along the fact that here we are at the most technologically advanced conference in the world, lining up for sessions like hungover KISS groupies, standing in line for a ticket…
With your interest in Video Conferencing, I recommend you take a look at Wiziq's virtual classroom and authorstream's power point presentation platform. Both are web based platforms, have a bunch of features and free basic service.