We’ve been making extensive use of GVC for corporate collaboration.
It’s damned impressive, but there’s NO information from Google’s official channels on what’s going on with it.
There is, however, an authoritative source.
One of the lead developers has a personal blog …
juberjabber: Gmail voice and video v1.0.5
… Today we released the 1.0.5 update for the Gmail voice and video chat software. All current installations will begin an automatic update within the next 24 hours. If you do not want to wait, you can visit http://mail.google.com/videochat and re-run the installer…
They’ve done a lot of work on the Mac version. It was grossly unstable a month ago, but I’m going to be retesting.