Craig Shirky writes a compelling article on WiFi and VOIP. These technologies are important to watch. VOIP is close. We'll all have it in 3 years. It's not ready for prime time, yet. I tried using Vonage. (I won't flatter then with a link) their customer service is terrible. Don't bother (yet). They have no competition whatsoever. This will change. Things will improve.
WiFi is pervasive. We've got it in our office. If patients want to bring their laptops … they are welcome to 'surf' in our waiting room. Don't worry. The EMR is locked down pretty well.