Thought I'd share with you AMD guys, there's some good info here. The 7900 series will launch before Christmas, no specific date has been given yet.
The 7000 series uses XDR2 memory, it is twice as fast as DDR5. The TDP is 190W. The 7970 has 2048 shader cores, 128 texture units and 64 ROPs.
http://lenzfire.com/2011/10/amd-is-planning-for-its-new-radeon-hd-7900-series-graphics-for-2011/
The 7000 series uses XDR2 memory, it is twice as fast as DDR5. The TDP is 190W. The 7970 has 2048 shader cores, 128 texture units and 64 ROPs.
http://lenzfire.com/2011/10/amd-is-planning-for-its-new-radeon-hd-7900-series-graphics-for-2011/