I have it in my head to GM for a game where the players are explorators and tech-guard in Dark Heresy aboard a flotilla of mechanicus ships bound for the distant reaches of the Calixis Sector, in search of lost technology and secrets. Obviously this will require some homebrewing of existing classes to be more mechanicus-y and less imperium-y, and to include augmetics. That part I think I can handle, the D20 system and some creative players prepared me for ECL (Effective Character Level) quite well.
What I need are more ideas. I have a good many right for what they could do for missions: everything from encountering mutants, xenos, and heretics in the belly of hive worlds and in the ravages of feral and abandoned worlds (not to mention having to work with and around the Adeptus already there) as they scour the sector for ancient Tech to fill their reliquary.... techniquary?
My problem is... what do fleets made of entirely tech guard, priests, and explorators do when they're not exploratoring? Do they even have any kind of social interaction between missions, or do they just sit and pray to the engines until the Omnissiah comes home? I can certainly make something up, but I'd prefer to stick close the canon.