Once this has been created, I was planning to add a link to the CentOS office hours youtube vid and some summary notes of what was discussed.
Done - http://wiki.centos.org/SpecialInterestGroup/VoIP has been created, and some preliminary (and very brief) information has been added. Please add your name to the bottom if you're interested in participating in the SIG. You'll need to request wiki access through the centos-docs@centos.org mailing list.