I'd love to see a space elevator/tether in the game. Because they are badass and cool and everything Planetary Annihilation strives to be. Could be a T2 orbital factory, an alternative to space cannons/landers/teleporters, whatever works. As long as it looks cool and blows up cool.
We've already got quite a few threads that talk about space elevators, might be worth checking them out. EDIT: Dammit BM! ;p Mike