I heard through the grapevine that the in production version of Yahoo Messenger, that is being rewritten from the ground up, for the Macintosh will include Video.
I'm also hearing that the USA launch of VOIP with Y! Messenger is likely within the next month or so, and certainly before VON in March. It seems Yahoo has internal promotional programs that new product releases need to fall into.
Expect to see Beta of the new version just before the actual offering goes live here in the USA. Folks in Canada can get it now though and in a few other countries around the world.