I asked somebody who will be at Oshkosh a few questions yesterday.
I tried to ask a few questions that have been posted on here for your benefit. I too was once looking for a job.
1) Wear casual clothing. If you are wearing a suit and tie you are more likely to be considered crazy.
2) It's a serious event for recruitment. All the Chief Pilots will attend, they take this time seriously. At this particular point in time the Chief Pilots have a large say in the application process. You will be graded on your time talking to them.
3) Hiring continues. The last group of interviews a few weeks ago were being offered class dates already. If I understood correctly they will all be in class by August 22.
4) The pool is empty. I am unsure whether there is a Horizon pool or not. I forgot to ask.
Looking for a job sucks. I remember.
Best of luck to all of you.