Like the thread title says, any interest in an Eberron game? I'd prefer Pathfinder, but if there was enough interest I could possibly be persuaded to do it 4e.
As for the plot, each PC would be a surviving member of the same unit of irregulars who fought for Breland in the Great War. The PC's would start at 3rd level, two years after the end of the war and they would have no recollection of their last mission. The impetus for the campaign would be that the few surviving members of their unit are being murdered messily, one by one. To uncover the truth of what and why the murders are happening the PC's will need to regroup and go on a 'grand adventure' - capture the murderer or murderers, track down their former commanding officer and other unit members, retrace their last mission to learn what happened to them...
I want to include a number of things that are very Eberron; trains, airships, Inquisitors, Dragonmarks, Artificers, warforged, the new religions like the Silver Flame and the Blood of Vol and basically have great fun exploring this new world.
Please bear in mind this game isn't a certainty, I'm still only thinking about doing this.