Sorry Boerd, missed your post

What has happened that I can recall

Conflicts:
Raid on planet N-1 (L'Er vs Valkian)
Assualt on Outpost A-5 (L'Er vs Eternal Union)
Battle above Earth (Terrans vs NPC)
Sol first contact skirmish (Terrans vs Eterneal Union)
Ethereal Gathering search (Ethereal Gathering VS NPC)

Diplomacy

Eternal Union and Terran first contact negotiations
Mandolorian and EU first contact
Sazkatjhit and EU first contact

I may have missed something though, but I think that's pretty much the gist of what's going on

To answer who's the biggest, in terms of planets alone, almost certainly me or the Custodes, but most of my worlds are owned by individual minor hives with little capability, and most of those of the Custodes are basically wild life sanctuaries, I believe. In terms of truly developed planets, Duck's certainly up there.