Actually, on another forum I'm gathering people and we're working on a linear campaign. So far I'm the only one actually making the missions, with others as playtesters, story ideas, and someone else that likes to do all the writing for the briefings and such. Actually, we may have a short story for a mission or set of missions too depending on how it goes. Also, now that we know how to do it, we're probably going to be adding voice overs to the game for our missions.
Right now only the first mission is done, but it can be found here. :) All missions and files relating to it will be uploaded there - updated files will replace old ones.
The basic gameplay mechanics of it are pretty much done anyway, in terms of what the mission involves. Still going to add voiceovers, then a "universe template" - which will be put in each mission. (things like bases, carriers, gates, and fleets that should always be in a certain area).
So if you guys want to add ideas or playtest, ect, I'm totally open to suggestions. :) The more ideas I can get, the better it'll be. (The second mission is already sort of planned)