maybe we'll split the cost and take turns using it, lol. That thing's too extreme for me. The price for the 512MB is making the 7800GTX 256MB price look real good right about now.
Also, Intel will release a new 975X chipset early next year that will support both Crossfire and SLi. Just want to throw that in there.
Here's some more info. at XFX site regarding this product:
XFX GeForce 7800 GTX 512MB DDR3 PCI-E
XFX GeForce 7800 GTX 512MB DDR3 XXX Edition