Flannum addressed the specifics of how Guild Wars 2's servers work in relation to transfers. While there is a traditional paid transfer service (which can be used only every seven days), all players will have the ability to hop over to friends' servers as a guest. Player team-ups are further made possible by the dynamic level-adjusting system that scales players down to the zone they're occupying.
This process is made easier by ArenaNet's decision to make friend lists and guilds account-wide instead of specific to a server. So while each guild has a home server, other chapters can exist elsewhere. Flannum also said that the team is carefully structuring its PvP system so that it will be free from potential abuse by server guesting.