s775 will be around for years. What I meant is Intel wont be producing them soon. Nehalem wont be s775.
What I meant was : 45nm Intel Core 2 chips will be in production well into 2009.
It's been 2 years since socket AM2 "killed" s939. You can still buy chips for it at silly prices.
You can count on Nehalem to reach mainstream about Q4 2009. That's eons away in computer timescale.