Guild ReputationFirstly, the whole guild currency idea has been scrapped. The rewards that they had originally had in mind for that system, like special guild tabards and mounts (with your guild insignia on them and everything!) are now unlocked by guild achievements. Rather than buying them with guild currency, you buy them with simple gold—but which rewards you can buy is restricted by your guild reputation.You farm guild rep by doing four things:■Completing quests■Doing rated Battlegrounds■Killing raid bosses (to get credit, the raid that downs the boss must be mostly comprised of guild members—7/10 for 10-mans, and 20/25 for 25-mans)■Earning guild achievementsBasically, you'll be farming rep with your guild in exactly the same way you would farm any endgame rep—and the rewards will (presumably) be similar. A final decision hasn't been made yet about how guild reputation will transfer (if at all) between alts, but they did say that leaving a guild won't immediately wipe your guild reputation—though joining a new guild probably will.