Below are some links to other flying-related Web resources. Michele's Virtual Hanger has links to a huge variety of other resources. Cyber Flight Deck is another gold mine for fliers. US Aviator, although sometimes a bit quirky, has a lot of news and other information about flying in general and aerobatics and homebuilt aircraft in particular.
The International Aerobatics Club oversees aerobatic competition in the US, and fosters aerobatics through local chapters throughout the world. The FAI is an umbrella organization for many national clubs and oversees all kinds of air sporting events as well as world record attempts. Both of these sites have many links to other flying-related sites.