Not a central place, but generally, they are discussed on this board. There are several Eagle fairs in June/July. An Air-Inc fair in Sept, IIRC. An aviationinterviews.com fair in July in ORD.

If you are not having luck after a month of resumes out and your meet mins, these fairs are golden. Many airlines are interviewing on the spot and you often get to bypass the dreaded sim ride. I was interviewed and hired by RAH at the last Air-Inc fair in ATL. While I strongly disliked spending the $160 to go to the fair(plus airfare), it was worth my money in the end. The people there are the same people who are looking at your resumes online. There is tremendous value to putting that human contact to a name. You making the effort to travel to them shows your interest. Its a much more efficient process then the send and pray internet technique and you will be able to gauge their level of interest in you. The forum where they present their plans for the next few years is also very interesting as well. Good luck in your job search!