I have rec'd the new "metal" card and used it. Had and still have the Amazon Prime card (GE/Sync version), but I didn't have the Chase version since it really offered nothing over the basic Amazon account or what other cards offer towards Amazon purchases. My new Chase-Amaz card showed up on my Chase accounts the day I was approved.
My wife received her new card. It was due to expire soon so I guess they just decided to go ahead and send her the card with the new design. As far as the title change, it was done automatically like a day after the announcement of the new structure.
Mine shows the updated name/logo on the Chase website and my recent statement shows 5% back on a few recent purchases. Have not received the new card yet though. Mine has approximately 2 years until expiration. Possible they're working backwards from most recent expiration to oldest expiration date?