In the latest issue of Game Informer (via Videogamer), Gibeau had this to say:
We have nothing to announce…We love Faith. We love the property. It’s really about how and when do you bring it back?
It’s on the list. It’s just about looking at what teams are available, who’s got the right quality approach to it, and who understands it.
I’m assuming that if we do ever get to hear an official announcement for Mirror’s Edge 2, it will most likely be for next-gen platforms as this gen is about to draw to a close.
So, in the meantime, keep the faith!