In a post on the official Call of Duty forums, Beachhead had this to say:
To release a mobile application to the public, it needs approval from parties that don’t work at Activision. For example, iPhone apps need to be approved by Apple.
There were some difficulties in releasing the ELITE mobile apps. For one thing, ELITE was totally unstable at launch. For another, some parts of the application needed updating for security and performance, just like the site or console application.
I can tell you that the mobile application is in final submission and awaiting approval from the powers that be. That means we’re pretty close although it will not happen in December. I will find out if I’m allowed to give you a specific date. Hold that thought.