Drifter, the seminars are normally 3 days worth of classes and information with an airline briefing and a chance to talk to them. Most important, attend the airline briefing and following that each of the airlines set up booths and we all get to give them our resume and talk.
I got my interview from talking to Comair. Comair comes to the seminar planning on giving out interviews. You only have a few minutes, so come prepared. You need to listen to their brief and sell yourself. Try to be near the front of the line then they know your really serious when this session begins.
If you havent yet, join Air-inc. If you are going to join 1 organization to prepare for the airlines, they are it. You dont have to do their full package, but they provide good info that is on target.
Good Luck