"Intel Corp., the world's largest maker of silicon chips for computers, has decided to abandon the plan to incorporate wireless LAN functionality into its i915- and i925X-series desktop chipsets. The move was said to be conditioned by low demand from OEMs for the technology."
Basically, 802.11g access points, routers and adapters are being taken up at a really strong rate, and this makes Intel's integration of WLAN into i915 and i925X chipsets less and less attractive. More here.