Turns out that the Air Force is blocking Wikileaks, aiming to keep its personel from accessing more than 25 sites which contain classified material. The Journal is of course not subject to the rule, having pointedly decided not to publish Wikileaks material.  

The move is  based on military protocol, which states that classified material must be kept off unclassified computer systems.

But a defense official who spoke with the the Journal said blocking The New York Times was a misinterpretation of military guidance.

Hard to see the point of denying Air Force personnel access to information that they and everyone else in the world have been reading for weeks. But hey, Don't Access, Don't Tell has a familiar ring to it.