Model Aviation Links...
The Academy of Model Aeronautics http://www.modelaircraft.org/
Great Planes RealFlight Simulator http://www.realflight.com/index.html
International Miniature Aerobatic Club IMAC http://www.mini-iac.com/
Rick's R/C Helicopters http://www.ronlund.com/home_frame.htm
Vario Helicopter http://www.variousa.net/cgi-local/web_store/web_store.cgi
RCOnline http://www.rconline.com/rco/
Tower Hobbies http://www.towerhobbies.com/listings.html
A couple of personal sites....
Chet Tuthill (lots of airborne video stuff) http://frontpage.home.net/ctuthill2/
The Chopper Man http://www.chopperman.nl/