I deeply apoligize if this has already been sugested, i looked for it and i couldnt find it.
My idea is a large chain of 1 way trade runs going all the way around the entire game (except class restricted gates) that bounces between sectors and systems. To make it actually used and not overpowered it would have to be roughly equivilant in a credits/XP per (trips through gate and distance warped) to somerled Prasad (aka the spice run). And it would also have to be a short number of stations between them to keep things exciting. somewhere in the 2-4 gates range. And to really shake thing up... There should be no decent trade for the return trip on any of the segments ;D
It would make trade runs a heck of a lot less boring and involve more sectors in trade and be a neat thing to do.
However if any one of those conditions arnt met...
No one wll do it and It will be a waste of time to even make :( and i would hate to see that happen.