NIST "voices" concerns over security of VOIP

We're planning to have some VOIP equipment at the Winter Working Meeting so that we can all explore the technology and have a better factual grounding for our conversations at the meeting. It is perhaps appropos that the National Institute of Standards and Technology recently issued a reported entitled "Security Considerations for Voice Over IP (VoIP) Systems." The report is available at the NIST Computer Security Resource Center, http://csrc.nist.gov/publications/nistpubs/#sp800-58.