The Mango update for Windows Phone 7 is coming this fall and I was curious if ATT has any plans to allow the native visual voice mail in the Mango update work on their network.

I know that ATT supports VVM with the iPhone and BBs right now, but unfortunately WP7 running Mango currently have no option to use VVM.  (T-Mobile's network currently allows VVM in Mango just to verify the option exists)

Any idea when this maybe unlocked? 

Thank you.