Here is the latest from Toyota on 11/6/2012:
Thank you for contacting Toyota Motor Sales, U.S.A., Inc. We appreciate the opportunity to address your inquiry.
We apologize for your dissatisfaction of your Navigation system for your 2012 Camry. Your vehicle currently has the most up to date Navigation information available at this time. The audio system in your 2012 Camry, VIN: XXXXXXXXXXXXXXX, has the HDD audio system that is updated via air waves. We apologize, at this time there is no estimated time the navigation system upgrade will be available.
You may check back with us or your local Toyota dealership early next year for any updates. Your feedback is appreciated and it is through comments such as yours that we are able to review and improve our products and services. We apologize for any inconvenience this has caused you.
If we can be of further assistance, please feel free to contact us www.toyota.com/help/contactus.html
Toyota Customer Experience