Somewhat related to operational issues:
"AUSTIN, Texas � March 28, 2005 � The Voice over IP Security
Alliance (VOIPSA), today announced its newly elected board
of directors as well as its short-term projects to develop
a threat taxonomy and document security requirements for
VoIP networks. VOIPSA is an open group with the purpose
of improving the public awareness of issues and best
practices for security and privacy of Voice over IP,
and is inviting participation in the new projects."
http://www.voipsa.org/press/03282005.html
- ferg