Guild Wars 2 in September, and it's bringing improvements to guild functions along with it. It's starting with the rollout of global guilds, allowing the resources earned by a given guild on all worlds to feed into the same central group, rather than creating small-scale copies of the guild on every individual world. That includes guild vaults, guild merits, and guild influence, all of which will be pooled with the feature pack update.
Guild missions and finding allies on different maps will also receive improvements, making it easier to take care of objectives with your friends across the globe. The official post also discusses the language divisions found on European servers, with the team electing not to split players based upon language at this time to bolster population. Read the full update for more details on how the changes will affect guilds and players when the patch goes live in September.