Here is a list of planes that are currently unavailable to FS 2002, FS2004, or FSX users. Not all planes are listed but here are some of the more important missing ones. If anybody can take up one of these projects to help bring to the fs comunity these lesser known (yet in some cases equally important) planes, it would be much appreciated.
Bell X-1 http://www.fortunecity.com/marina/manatee/272/x-1.html
Bell x-2 http://www.fortunecity.com/marina/manatee/272/x-2.html
Bell X-5 http://www.fortunecity.com/marina/manatee/272/x-5.html
Grumman X-29 http://www.fortunecity.com/marina/manatee/272/x-29.html
McDonnell Douglas X-36 http://www.fas.org/man/dod-101/sys/ac/x-36-line.gif
North American Sabreliner http://en.wikipedia.org/wiki/T-39_Sabreliner
Rockwell B-1 Lancer http://en.wikipedia.org/wiki/B-1_Lancer
Beriev Be-2500 http://en.wikipedia.org/wiki/Beriev_Be-2500
Blohm + Voss BV 238 http://en.wikipedia.org/wiki/Blohm_%2B_Voss_BV_238
I will try to post more planes that need to be created as time allows but for now im starting on my fav plane the B1.