No way have all the good campaign ideas been used up! I come up with new ones practically once a week, but I just can't make them all. I have, in my head, about 5 different campaign stgorylines and even more vague ideas, eg.
- Development of beams - Prequel
- Alternate universe reached by freaky knossos (I know this has been discussed before but I got my idea before that. Honest)
- Dangerous amounts of power that large corporations begin to wield over the GTVA after Capella (I have about 3 pages back and front about this one

)
- Development of Subspace - another prequel, difficult to do at first but eventually...
- Sol make contact with us (I had some ideas about the nature of subspace 6 months or so ago and got the wickedest idea for how this could happen, so while the base storyline isn't exactly original, the rest was rather unique)
- Rediscovery of a hidden HoL fleet by a pirate group who use it to grab for power in regional systems of the GTVA. Sure it's a genericish 'rebellion' storyline but I had a few twists, namely they won and managed to control about 4 or 5 systems for a while. (I'm writing this one as a fanfic at the moment but it could easily become a campaign)
The point I'm trying to make is that it's not campaign ideas that are lacking - it's creativity. People are being lazy. Not that I'm knocking your idea, as it's a fresh one, and fresh ideas are good, and prescisely what I'm trying to promote.