I hope this debuts at GenCon? I did not see any events for it, yet. Anyone else find one?

Quick Google search for Silver Line Games + Elder Sign, Fantasy Flight Games + Elder Sign, Gen Con 2011 + Elder Sign, Gen Con 2011 + Fantasy Flight Games and Gen Con + Silver Line Games yield nothing about Elder Sign.

They just added a whole bunch of events recently and Elder Sign was one of them. You can see a list of all the times here:

gencon.highprogrammer.com/gencon-indy-2011.cgi/type/BGM/Elder_Sign