It's very true that nVidia can adopt whatever memory standard they like. It just means that if they back a losing horse they will have to re-design their memory interface to back the jedec standard, otherwise prices will be inflated.
It's still very interesting that the 256bit mem interface idea should crop up, if it is then the R300 has an equal partner in the war (not counting other features), but if nVidia decide to go with some form of DDRII and 256bit mem, then it's going to be a hard fight for ATi.
Folding for Beyond3D
"A lie gets halfway around the world before the truth has a chance to get its pants on."
Sir Winston Churchill
"Halflife2 got halfway around the world before Gabe had a chance to get his pants on."