Part of the fun of the very fun Facebook-anchored version of You Don't Know Jack is that because Jellyvision is constantly adding new questions and content, they can stay current. It also means, apparently, that they can have guest stars.

I have many fond memories of playing the original You Don't Know Jack and its various expansions back in the late 90's on PC. Starting today, the series' recent revitalization has hit a new high point: You Don't Know Jack has come to Facebook, and it is wonderful.