http://www.computerbase.de/news/2011-11/details-zu-anstehenden-28-nm-grafikloesungen-von-amd/
http://www.computerbase.de/news/2011-11/details-zu-anstehenden-28-nm-grafikloesungen-von-nvidia/
Mobile HD 7000 and 600M information just sprung up. nVidia might be going to optical shrinks of Fermi to 28nm. The HD 7000 lists true Southern Islands parts, at least based on the code names, in 28nm but I have seen slides for relabeled HD 6000M paired with Llano under the HD 7xxx moniker as well. It is a mess.
Would just like to point out that it looks like 28nm will actually be mobile kepler parts based on performance claims of 80-100% from Nvidia.