I'm really not too sure, but I do know that if you do something every other day, you'll have a hard time doing it 5 or 6 times a week. You'd probably wind up doing it 3 or 4 times a week instead.

Otherwise, it'd seem like its just a natural progression from doing your pushups and other tricep/chest exercise. Once your arms are strong enough, doing one armed pushups will essentially double the workload for each individual arm.