A few well known Betas:
John Wooden - legendary UCLA basketball coach (10 national titles)
Gary Barnett - head football coach, Colorado
Dick Gephardt - Congressman (House minority leader)
Kyle Brandt - MTV Real World Chicago
Mike Schimdt - Hall of Fame 3rd baseman, Philadelphia Phillies
Scott McCarron - professional golfer
Samuel Palmisano - newly elected CEO, IBM
Adam West - actor (original batman series)
Stephen Sondheim -
famous broadway composer (West Side Story)
George Peppard - actor, Hannibal (the A-Team)
Also...
*More Congressmen, Senators, Supreme Court Justices and Olympic Medalists than any other fraternity* (atleast thats what they tell me

)