China Mobile dragging feet on BlackBerry launch?

Despite the news several weeks ago that RIM has started shipping official BlackBerrys to China with the intention of selling them before 2007 was spoken for, its carrier partner there, China Mobile, has yet to pull the trigger and launch them in the retail channel. It's unclear exactly what the holdup is -- even to RIM, whose top exec for the region has said "You should ask China Mobile about the timeline." One popular theory is that RIM needs to convince the Chinese government that its handsets don't pose a security risk to its networks, though with a couple service outage scares around here in recent months, we'd say that the network might actually pose more of a risk to the handsets than anything else.