VR Zone reports AMD made a last minute decision to launch the Radeon HD 7900 series on December 22nd instead of on January 9th. It seems more like a paperlaunch though, as widespread availability isn't expected until January 9, 2012.
Now, it looks like the Radeon HD 7970 will launch on December 22, 2011, bringing a Christmas gift to all the current AMD users and those that want to become one. This will be a very limited launch, with the real availability only coming on January 9, 2012 - which should be the launch date for the Radeon HD 7950.
The interesting bit about the Radeon HD 7950 is that the board is coming out as a custom part, and AMD gave freedom to partners to clock the part anyway they want, there is flexibility in terms of amount of memory, 3rd party cooling - just like GeForce GTX 560 launch, expect a lot of different parts coming from all the usual suspects.