Just because the MB manufacturers have access to the OPNs for these parts doesn't guarantee they'll ever materialize in large numbers. In the past there were chips such as the socket 754 3200+ and 3400+ Venice, 6000+ 89W Windsor, and AM2+ 9850 95W that appeared in much lower quantities than their slower or higher wattage brethren (and often at a price premium). Some of these were held back for OEM use and then dumped on resellers later on when better things were already on the market and the novelty had worn off. The OPN for the X3 740 BE has been known for months know and it hasn't shown up.