Sources
3 Fabs: From the top of my head, last i remember Andy Bryants comments in one of the recent Conference calls, i believe the one in January. Transcript is on seekingalpha.
4 Fabs: Recent Analyst Day presentation 07, the one from the chap talking about manufacturing, he did not leave an impression strong enough i remember his name.
I think you should really keep track on Intels fabcounts for leading-edge.
K.