Like mrxak's challenge, but lamer.
For those developers out there looking to really twist and hack the Nova engine, here's some things I was thinking up today. Anyone is welcome to see if they can make these work, out of simple curiosity if nothing else.
Escorts give aid: They're your escorts. You pay to keep them around, or at least shot at them to convince them to stay. Doesn't it make sense that they should spot you a jump's worth of fuel when you run out? See if you can find a way to use mďsns, NCBs, or whatever to get your escorts to give you some fuel.
Ship Anatomy: I was pondering a Ship Engineering Degree outfit, like a certification the player could buy. This outfit could generally streamline your ship, making it faster and more fuel-efficient, among other things, and I thought it would be cool if the player's newfound knowledge of ship design allowed him to aim for vulnerable parts of other vessels, implemented simply by a boost in all of your weapons' damage. Find a way to create an outfit that boosts the power of weapons already outfitted.
Jettison Weapon: I was thinking of a fighter that carried a very large gun or missile launcher, then ejected the whole unit when the ammo was expended, resulting in a speed boost. Find some way to implement this, maybe a mission that removes the outfit when you abort it... but it'd be cool if the AI could do it too, if possible.
So give these a whirl, if you feel like it. You could even post a plug to show it off.