Volunteering
There should be a streamlined standardized pipeline for people who have both the desire, time and knoledge to offer Bethesda their skills pro bono . First and foremost, i am thinking about small specific tasks such as weapon design -you could submit a 3D model along with textures and so forth -, voice recordings - you could record generic NPC one-lines like ?I don't want to be bothered, starnger? and Bethesda would include the appropriate few in the game, or, on a more abstact level, ways to improve the Combat AI, where yould describe both the conceptual and the programming levels of your idea.
I also believe this forum coiuld jumpstart the whole unix approach. Collective projects.