The ship

that's a good idea, the colonies then would have been set up to somewhere around the wormhole entrances/exits

And some of them might be hidden by some strange forces (gravital fields, blackholes, etc.) And if one wormhole has one extermity in contact with a blackhole, the other extermety would by blocked. And the blocked wormholes would have some extra arms! (A normal one would be like a small line.)

This is starting to sound so much like EVE.

And a little bit like nexus, and I love that game.

Sorry, the Double Post/ Necro, but I found a good image for the ship: