EAA AirVenture 2008, the big air show held in Oshkosh, Wisconsin, has thousands of aircraft, including many homebuilts and other small planes. The spirit of the event is friendly to small space startups. In fact, the Tuesday of the event is "Learn about Space Tourism" day with Sir Richard Branson and homebuilt plane pioneer Burt Rutan, while Friday starts a 2-day Rocket Racing League exhibition race. The AirVenture Museum even has a SpaceShipOne replica. It's not an event, or a community, for entrepreneurial space interests to ignore. Of course there are a lot of diverse aviation displays, workshops, tours, air shows, celebrities, and more.
The Oshkosh show is scheduled for July 28-August 3. However, the General Aviation Challenge all the way in California was scheduled to start registration on August 3, which would surely be a conflict for aviation fans and GAT teams. To enable people to attend both events (perhaps flying their own planes from 1 to the other), the GAT registration start is rescheduled to go until 8 PM August 4.