You should consider running a front page news piece on the recent availability of 512mb 7900 GT graphics cards.
There are currently 3 models on the market:
Gainward BLISS Geforce 7900 GT 512mb "Goes Like Hell" - http://www.gainward.net/products/pro...products_id=49
Xpertvision 7900 GT Sonic - http://www.xpertvision.com.tw/en/pro...0GT-Sonic.html
The Gainward and Xpertvision cards are identical except for labelling/pcb color since both companies are subsiduaries of palit (www.palit.com.tw
The last one is by sparkle, don't know a lot about this one other than core clock is slower than those above (500 vs 550). - http://www.tgdaily.com/2006/04/14/sp...graphics_card/
The cards are available in Australia and the UK, not sure about USA, but I fail to see why they would not be sold there.
I believe they offer exceptional value for money and should be aggresively pushed at those considering an ATi x1800 XT because of its 512mb of memory.