Aha, found my notebook.
Power groups that emerge:
Velvet Curtain: This group seeks to put humanity's head in the sand, so to speak. Get rid of radio tranmissions and other emanations that would make humanity stand out, and continue ignoring the galaxy. Bands together with ecoterrorists to knock out comm infrastructure.
Eco-terrorists: Many many groups surface, demanding more attention be paid to Earth's restoration before they try colonizing other planets, with varying amounts of zealotry and focus.
United Earth Industries: Group of corporations who encourage expansion and development, but want to become.. well, megacorporations basically. They have contracts for much of the relevant work.
Order of the Golden Star: Group of military officials who believe that mankind will need a firm hand to guide them in a hostile universe, wanting to put more and more and more under military control.
Majestic 12: Area 51 on steroids. Obsessed with alien technology, has technology that *didn't* come with the fleet, and is sometimes randomly aided by Men In Black, who are *not* part of MJ12.
The Last Kings: Old governments and power groups who want mankind to expand outside of earth, while they reclaim power and money planetside and expand in the wake.