The event's one PLATO history session, featuring Don Bitzer, Lippold Haken, and Peter Braunfeld, starts around then. The embedded video window below should activate around 8:45am Central Time on Thurs, April 15, 2010:

For more info on the conference please see http://50years.lis.illinois.edu/.

UPDATE 6/24/2010 --- I've updated the video to be the archived video since this is no longer streaming live obviously :-)