MSI has listed two 8800 GT cards with 256MB of memory. Both of the cards will feature a red PCB, which actually looks odd, since red just isn't screaming Nvidia.
The first one is branded NX8800GT-T2D256E-OC and works at 660MHz for the core and comes with 256MB of GDDR3 memory that clocked at 1900MHz. The Shader clock has had a respective boost from the reference 1500MHz to 1600MHz. The second card, branded NX8800GT-T2D256E comes with the same red PCB and reference clocks. The core works at 600MHz and it comes with 256MB of GDDR3 memory clocked at 1800MHz. The Shader clock remained at the reference speed of 1500MHz.
The OC-ed one might be good if you manage to find one, since Nvidia's availability issue is still taking its toll on the 8800 GT. Of course, there is still an issue that the community prefers 512MB versions, but then again price might draw a bit more attention to the 256MB version. You can check out these two cards at MSI's website.