Finally an official confirmation from the Unofficial T-Mobile blog, there will be a launch of a Google phone on January 5th at 9am (question is, is that PST ?) There is no specific mention that this will be the Nexus One but I think it is safe to assume that it will be the phone that Google has been dogfeeding it’s employees.
Update: Gizmondo just got ahold of an official Google Android press gathering.