Via INQ,
http://www.theinquirer.net/?article=24539
http://www.theinquirer.net/?article=24539
But developers are now getting the "Real" hardware still based on G5 MACs but this time with real R500 graphic cards inside. This means that R500 chip is taped out and that it is working but we don’t know whether this is the final chip that Microsoft plans to ship at later date.
Microsoft plans to ship hundreds of thousands if not even millions of Xbox 360 consoles world wide from October, so it has to have at least that many R500 chips to power those consoles.
We heard few times that Microsoft will get both R500 and CPUs from IBM’s Fishkill factory in New York. We cannot confirm this at this date but it sounds very likely to us.