Can you take four hours of the Today show?

was reading about NBC's plans of adding a fourth (!) hour to the 'Today' show in the fall. Al Roker and Ann Curry are currently hosting the third hour. Meredith Viera can't do it b/c according to this article, "Since she is host of the game show 'Who Wants to Be a Millionaire,' her contract forbids her from being a part of another show past 9 a.m. each day." i did not know that