I think this is a great way to promote a more communal attitude on Guild Wars as opposed to the usual MMORPG selfishness. Sure we all want what's best for our own characters but say you get a few coloured dye drops after all 6+ of your characters have several 15k armours dyed perfectly already, or a few extra crafting materials that you don't need, or just that spare 43g.
I do realise that guildhopping theives would be a problem but a time limit (like you have to have been in the guild a week/month/whatever before using Guild Storage) would help to limit that. Perhaps 'reserving' items for paticular players (Warrior A finds 35 Monstrous Fangs for Necro B and puts them into storage but only Warrior A and Necro B can take them out) would help too.
/Signed
S

