My gouge in '05 was the same stuff they used in '03...
No ATP stuff or test needed AFAIK, just situational questions, maybe a question or two on an airplane you flew. Do the sim prep, not only to practice but if they like you when you do it you'll get good comments for the interview (yes it's part of the interview...). Look through your logbook to come up with stories.
It'll be competitive, they ain't hiring many.