Micron is creating the Copperhead chipset upon which Tualatins will ride, and one poster to Silicon Investor is alleging that the reason for the move is because of pre-conditions Intel imposed to license AGTL+.
However, although we do love conspiracy theories here at the INQUIRER, usually life turns out to be far more banal than that - unfortunately.
You can find the original SI thread with the link to Xbit Labs here. µ