According to Teltarif and the Intel website, Intel will soon launch a new version of their Centrino notebook chipset under the name of "Centrino 2". The Centrino 2 platform will be sold with two different wireless chips: "Shirley Peak" will be the default standard 802.11agn Wifi module. Alternatively a combined Wifi / WiMAX chip named "Echo Peak" brings WiMAX connectivity as part of the chipset but will likely be a bit more expensive than the Wifi only module.
I am a bit disappointed that Intel didn't have the guts to ship WiMAX as a standard feature with their next generation notebook chipset. It would surely have helped to push WiMAX a lot more. So the question is now how much the price difference is between Shirely and Echo. Let's hope it is small enough to encourage companies to use it as a differentiator.