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http://www.incgamers.com/Interviews/250/guild-wars-2-developer-interview
Some clarifications by Martin:
Originally Posted by Martin Kerstein View Post
Aaaand some more clarifications on some points:
Well, principles like "hot joining" or "variable team sizes" are mechanics which are used by many FPS.
We are definitely looking into letting players organize their own tournaments.
More details will (of course) follow at a later time.
http://www.guildwars2guru.com/forum/guild-wars-2-developer-interview-t2745p11.html
Yays.