http://www.marketwatch.com/story/the-ipv6-forum-releases-the-ipv6-sip-ready- logo-program-2010-06-03?reflink=MW_news_stmp This press release talks about the IPv6 Forum releasing a test suite for testing SIP using IPv6. It's interesting because I'm not aware of much movement in the existing market space towards using IPv6 for SIP traffic, either on the consumer, business, or inter-carrier side. Frank