This is a mass-building program for bodyweight exercise written by Nick Nillson. You can apply it to other exercise also if You want. I like some of Nick's stuff ever since Fred talked about him.
http://ezinearticles.com/?Time-Volume-Training---A-Mass-Building-Program-For-Bodyweight-Exercises&id=1730329
Agree for a change up or a shock be nice change up. Think be good for muscle building!