I found article that outlined several of the various teams at ArenaNet if anyone is interested:
Live Security—You’ve heard from this team’s coordinator, Mike Lewis, already on our forums, so you’ve seen some of their early work and long-term plans already. Our security team is focused on fighting bots, spammers, and account thieves. They work closely with customer service in those areas.
Live Response—The Live Response team is focused on fixing bugs, addressing game feedback, and balancing the game. You’ve seen a lot of their work already in the update notes.
Living World—The Living World team is focused on adding new content to the game world. This team will be adding and refining the types of content you already know in PvE and WvW, as well as developing new features and rewards.
PvP/E-Sports—This team is dedicated to supporting and building the competitive PvP community. They will be building new features that help support the growth of Guild Wars 2 as a competitive game. Jonathan Sharp will be sharing more on this in the near future.
Holidays & Events—Our Holidays & Events team will be creating a variety of special holidays in Guild Wars 2, building on the long tradition of amazing holidays in Guild Wars. You can likely guess which holiday you will see from this team first, and I recommend that everyone check our website next week for more information about this exciting first event. On top of holidays, this team will also be creating in-game one-time events that occur and can change the world or drive narratives that come to a finite conclusion across the world.
Mac & Performance—This team is focused on development for Guild Wars 2 for the Mac. You’ve seen them recently release the Mac Beta Client as their first major project. They’ll also be focusing on client performance, helping ensure the game runs well on the widest range of hardware going forward.
Bonus teams—We will sometimes be creating additional teams not listed above. These teams will build specific cool features or events we decide we want to do outside of the scope of the other live teams. (Spoiler: We have some of these teams hard at work right now, and you’ll be seeing the first results of their efforts in November.) Lastly, we have our Commerce team [gem store].
http://stratics.com/archives/gw2/colin-johanson-outlines-guild-wars-2-live-game-development