A buddy of mine, brianpwins pointed me over to Mike Tyson's Push-up workout from the early 90s. A taste:
3pm: more ring work and 60 mins on the exercise bike (again working those huge legs for endurance) 5pm: 2000 sit-ups; 500-800 dips; 500 press-ups; 500 shrugs with a 30kg barbell and 10 mins of neck exercises 7pm: steak and pasta meal again with fruit juice (orange i think it was)
This guy must have been in insane good shape, I don't think I can do 800 dips in a week. Course, when your job is to be in shape, I guess doing nothing but eating and working out 7 days a week is the way to go :)