"PASSPO" (the forum member), correct me if I'm wrong about anything
The limited edition version of Wing includes a free ticket for "Wing Fes". I *think* getting a ticket is as simple as that. Their website and blog currently don't have any more details, but it will include a concert and handshake event. This is the third "Fes", so it should be relatively similar to the previous ones.
The first one, "Next Flight Fes", was at Hibiya Amphitheater, and had a part 1 and part 2, so you would have had to purchase both limited edition versions to attend the full event (each part was a couple hours long and included a concert and handshake event). "Natsuzora Hanabi Fes" was at Yomiuri Land on 8-26 (since it was at an amusement park, there was a special entrance for attendees so you didn't have to buy admission to the park). This event was just one part, and was from 2-6 PM. There was a concert followed by a handshake event. Aipon blogged the setlist
http://ameblo.jp/negishiai/day-20120827.html. I think the concert portion was 45 minutes and included about 10 songs, and their usual MC and "corners".
Someone at another forum actually went to this Fes (not a lot of info provided though)
http://forum.nihongogo.com/topic/5101-passpo-the-only-pop-group-licensed-to-fly-spaceships/page__st__110Their blog will have more information as it gets closer to the event. Are you thinking about going?