It's the number of times you review material over time that guarantees that you will master material.
In this seven and a half minute segment (download iPod compatible, 39MB), Tom Meloche makes the provocative statement that he needs only five minutes per day to assure mastery of key facts. Procuit's plan is to develop Facebook applications around key books used for training. One of the applications' key features will be to drill learners on the key facts they need to master the domain. It's the number of repetitions over multiple sleep cycles that matter.
Since the applications will be gathering points for communities, Tom expects community input to play a role in determining the facts to be mastered.