Maybe make the guilds able to go in "alliances" and (of course only if they r same alignment) so they can go on alliance raids and attack hard opponents. and maybe also make them able to give different guild titles their own names F.X. a general could in guild x be called Vice-President while guild Y would call him Presidents secretary the options r limitless.......
Also being able to give guild msg's so u dont miss just that guild raid where u just killed the Tarasque and any1 else than u r running around with MUCHO cooler equiptment or that kind of msg's.

PLZ tell me what u think????????