Voice actors in attendance included Elijah Wood (Beck), Tricia Helfer (the Grid) and Tron himself (Bruce Boxleitner). Also there were the consulting producers, who wrote Tron: Legacy, Edward Kitsis and Adam Horowitz. Ricky also mentions that he'll have interviews with Tron: Uprising cast and crew on his podcast. Visit his site for more info.
Disney XD was awesome enough to post it on their official YouTube channel.