In response to the NYCC thread, I am trying to get something together for the users venturing to Seattle for PAX Prime. With it being under a week away, it's too late for us to offer free tickets to the convention and get show specific merchandise created. What we can do, however, includes the following:
Provide users that are attending with a printable badge promoting their affiliation with Gaming.SE and attendance at PAX (below; thanks to Jin for whipping this up!)
Possibly plan a lunch meetup on August 27th for those in attendance
Possibly provide attendees with a limited number of shirts and stickers to wear and distribute at the convention
Those are the ideas that KatieK and I came up with (thanks Katie!). If you are attending the convention and are interested in any of these ideas or have suggestions, please let me know in the comments! We're limited by time, but we want to make your PAX Prime experience even more awesome.