picked up some interesting information regarding PvP in Guild Wars 2. Essentially, world PvP will be mimicking the RTS model. Resources such as stone mines can be conquered by players and will deliver stone to catapults by caravan. These deliveries can be intercepted by enemy players unless manned watchtowers are defending your roads and scouts are keeping track of enemy forces. Or, as ArenaNet put it, players can simply look for lost PvPers and smack them around a bit.
Complex is the operative word here, as making this system work with large numbers of players will be almost as difficult as making it work with very few. Plus, developers will be dealing with all the regular idiosyncrasies associated with grouping in an MMO such as PUGs, communication and unruly parents demanding for chores or homework to be completed. Even all that considered, we hope they can pull it off so we can reap the fun.
If you're looking for more information on Guild Wars 2, check out our recent interview with ArenaNet.