More info has popped up.
Source: PureOverclock & Tech Powerup
http://www.techpowerup.com/img/07-05-02/HIS01.png
http://www.techpowerup.com/img/07-05-02/HIS02.png
http://www.techpowerup.com/img/07-05-02/HIS03.png
http://www.techpowerup.com/img/07-05-02/HIS_X2900XT_GB_250.jpg
It seems that the full product page for the HIS Raedon HD 2900XT was accidentally uploaded to the HIS website, the page has since been removed - but that ain't gonna stop us from seeing it.
TechPowerUp managed to get some screenshots of the pages before they were removed and are now displaying them for our viewing pleasure. Unfortunately, we already knew all the information contained in the pages, but it never hurts to confirm rumors. The card displayed features 320 unified stream processing units, 8-channel 512-bit memory interface, high-speed 128-bit HDR (High Dynamic Range) rendering and up to 24x Custom Filter Anti-Aliasing. The product page claims the core to be 80nm - hopefully sooner rather than later the 80nm bunch become extinct and AMD set free the 65nm version.
Source: PureOverclock & Tech Powerup
http://www.techpowerup.com/img/07-05-02/HIS01.png
http://www.techpowerup.com/img/07-05-02/HIS02.png
http://www.techpowerup.com/img/07-05-02/HIS03.png
http://www.techpowerup.com/img/07-05-02/HIS_X2900XT_GB_250.jpg