how about classic TBS style only per game wonders?

- like an academy that starts off all future capships with level two or three.
- or an space coordinator to reduce travel time between friendly systems.
- or a great lab to give research bonuses.
- or a military industrial complex to speed up construction in a system.
- or some kind of defense grid or fleet headquates would be nice. ha, headquaters could give huge boost to fleet points.
- a jumpgate?
- embassy or peace spacestation? can be built anywhere, can only be attacked by pirates and generates trade ships i.e. money.

well, I think the point is clear, it could be almost any cool ability so long as its not completely overpowered. possible problem is of course that different races would hardly share the same wonders, so its a bit strange.