Seen this article, don't know if there is any truth in or not but these new GPU's sound a bit of alright, those considering buying the 2900pro may be better of waiting, though no prices have been set yet, i don't expect them to be expensive considering ATI need to make up ground on the big green monster.
http://en.hardspell.com/doc/showcont.asp?news_id=1458
RV670 will have RV670 XT and RV670 PRO, their symbols are Gladiator and Revival, that is to see there will be Radeon HD 2950 XT and Radeon HD 2950 PRO.
For specs, Gladiator, core clock 825MHz, 512MB GDDR4, 1.2GHz, Revival, 750MHz, 256MB/512MB GDDR3, 900MHz. Both of them used 55nm technology, bit-width 256-bit, support DirectX 10.1, Shader Model 4.1, PCI-E 2.0, UVD and new generation CF technology.
http://en.hardspell.com/doc/showcont.asp?news_id=1458