We know it's possible to claim keeps and other objectives in WvW, but I can't really find many details on it. Like how expensive is it (initial cost / over time) or even the currency used. Does the guild earn influence faster? I know about the Art of War and the bonuses from that, and I know the guild with the most members present (or most contribution perhaps) when the keep is taken gets a small time window to claim the objective before anyone else, but that's just about all I could find. Oh and there's the guild banners I suppose.
Anyone know more?