The iPad has rapidly become part of the NFL, with half of the 32 teams planning to use the iPad this fall for their playbook — and "revolutionizing playbooks" in the process, according to an aritcle on NFL.com. If you like football, you are no doubt aware how intricate the plays are and the challenges that players face learning the complex patterns. Of course, a big advantage is being able to integrate video into the playbooks. And the main issue in the transition is security, since digital content can so easily flit around the Internet and end up in the wrong hands.