Guild Wars: Factions Preview at Pro-G
PvP with no monthly fee.
Pro-G has a preview of Guild Wars: Factions up and ready to be perused.
"The Factions campaign itself is set on an Asian-styled continent called Cantha, and (as the title implies) the story revolves around a conflict between two warring factions, the Luxon and the Kurzick. Player guilds can form alliances to side with one of these two factions, and then engage in alliance battles, the result of which will give the victorious alliance control over towns and unlock elite-level cooperative quests."