It would be asweet addition to have player-generated cargo missions. Meaning "I left an FC battery at station Foo. I will pay someone 500 credits to bring it station Bar." And once setup, it gets added to the mission lists at both station Foo and Bar, and the credit transfers and whatnot happen automatically in the background. What if someone loses / steals your cargo? Well, that would have to have an appropriate faction drop for the carrier, and perhaps make it so that the owner of cargo could exact some sort of revenge of the carrier. Could make some cool dynamics....

I'm all for player driven content. Maybe not exactly what your saying but something that the player can contract out would definitely be cool.