OCWorkbench published some photos of the Dual HD 2600 XT graphics card from Sapphire which features two 2600XT GPUs on a single PCB.
This card uses 2 x HD2600XT ver A15. It uses Samsung 1.2ns GDDR3 (1GB). Core/Mem is rated at 800/1600. The card also requires two 6 pin power connector. This card is longer than the tradition HD 2600XT.
To take advantage of the 2nd core, Catalyst 7.9 needs to be used. Enabling CrossFire will make it run at higher speed. According to Sapphire and reports from the Chinese site, performance is below expectation.