cosmos,
It is very hard to get called from the online App only. I've not yet met anyone that got in that way. The best way is to have someone walk it in. If unable, then meeting with the recruiters face-to-face is the only other way that I've heard of.
I'm not sure if they will be at Airinc in May, but I heard they will not be at the one in March. BTW, they've hired a bunch from those recruiting events.