Communications has a post on the recent IMTC Forum 2005: The Future of Next Generation Networks: Convergence of VoIP, Videoconferencing and Mobile, May 10-12, 2005.
The IMTC is an industry association best known for championing video telephony. Many of the attendees have devoted 10, 15, even 20 years of effort to making video telephony work.
All of the presentations made at the Forum are linked to in this document (Word) on the IMTC web site. Some presentations worth highlighting include: