Please see the most recent updates in the "Where did the .com name go?" thread. Posts number 16 and 17.
I had seen these a long time ago, but since I never really looked into but rather "assumed" what it was I figured it was strictly Commercial Cargo Haulers. Not so initially, they apparently added that ability at some point though. This was more of a Bush Pilot/Cargo Hauler concept. Unfortunately the imagined concept (the community picking up on it and adding additional airports to the possible destinations) seems to have fizzled and as far as I can tell it never went beyond the initial release. There was a planned FSCargoX that I don't find in my searches, so I guess it never took off like it was hoped it would. Anyone know anything different?I had it although I preferred FS Cargo, similar concept.
http://secure.simmarket.com/fsaddon-fscargo.phtml