Aviation site Flight Global (http://www.flightglobal.com) has just
launched a new application called Airspace (http://www.airspace.aero)
which combines forums and image sharing. At the same time it has put
up 100 years of Flight International magazine pages which chronicle
almost the entire history of flight (http://www.flightglobal.com/
pdfarchive/index.html). It's worth a look.