Dan York made the following post on VoIPSA. Edwin Pena pleaded guilty to one of the very few real-world Voice Over IP (VoIP) security attacks. Of course the motive of the attack was ... toll fraud/theft of service. Check out the link below for more information:
Brian Lutz and I just completed a dry run of the SANS 540 class on Voice Over IP (VoIP) Security. This is a full 6 day class. We had 11 attendees and it went well. I understand the next class is in June. Its a great class, so if you are interested in the topic, please sign up.