The delays are due to two factors: one, the certification of the platform's WiMax capabilities, is "not a technical issue. It's paperwork," said Brown. "There were mistakes made while filing and testing our wireless antennas."
The second problem is with the upgraded integrated graphics. The inital release will be a "PM" version of the platform for use with separate graphics chips, such as those from Nvidia and ATI. The "GM" version with integrated graphics will follow in August.CNET News, Macworld