Well they let a muslim apologist do a TED talk here.
http://www.youtube.com/watch?v=fjeCUUINmXsClosest thing to an ex muslim TED talk is this one. But then again maajid nawaz is an extremely liberal muslim but not an ex muslim
http://www.youtube.com/watch?v=EZwxKPv1CwAI have a feeling the organization that runs these talks might be hesitant to to an ex muslim TED talk for fear of being accused of Islamophobia.
But I think someone should seriously attempt one by writing to the organization to see if they are interested.
I think that the people behind the CEMB youtube vids would be the perfect presenters for the job.