Will Eoin Colfer's book Airman be a movie?

yes, it is confirmed. But since there is no progress yet, and Colfer is working on other projects (AF movie, Plugged, possible AF book 8 and sequel to The Supernaturalist), it looks like it won't be out for a whie. Especially since only one movie at a time he can work on, and AF has more progress.

Even so, another thing confirmed is that the movie will be animated but using movement sensors like A Christmas Carol