I was just looking over the FireGL site (looking at the laptop equivalent of the HD2600 the FireGLC5600) and noticed a new 320 SPU / 256bit part the FireGL V7600.
http://ati.amd.com/products/workstation/fireglmatrix.html#pcie
IMO, that's the new HD2900Pro.
http://ati.amd.com/products/workstation/fireglmatrix.html#pcie
IMO, that's the new HD2900Pro.