Intel’s i915-series as well as i925X chipsets that will be officially unveiled on Monday will not bring much-anticipated Wi-Fi capabilities straight away, but the company will enable the technology sometimes later this year. The reason for the delay is “just classic “ramp a new technology into volume”, Intel’s officials told eWeek.Source: X-bit Labs
Still, even without Wi-Fi, the new chipsets are expected to be revolutionary for Intel. The i915G, i915P, i925X and derivatives will bring dual-channel DDR2 SDRAM memory, PCI Express x16 and x1 lanes for add-in cards, Intel Graphics Media Accelerator 900 (i915G only), 4 Serial ATA-150, Azalia audio as well as some other important capabilities, such as promising RAID technologies.
The reason for postpones of Intel’s software WLAN access points are not clear, but one of the possible problems may be availability of special daughter cards with antennas required for wireless networks’ operation. Intel provides certain logic to control WLAN access points with its ICH6W – a component of Intel’s forthcoming chipsets.
Intel postphones WLAN access point feature of Alderwood and Grantsdale chipsets

According to the latest sources Intel will not enable the WLAN acess point feature in its i915 Grantsdale and i925 Alderwood chipsets right after launch, instead it is planned to delay this capability till the year-end.