A password protected vault would be awesome.
It could be a service that could be bought for the guild hall, like a super Xunlai.... or a service with her. You click her in your Guild Hall and it says "Show me my storage account" and "Show me the Guild Vault", and she sez "Only if you have the secret password

The leader should be able to choose to password protect it or not...
Like in my case, I'm mainly playing with friends, we could have an open vault for our members. But pw protection would be great too...
Do the gw-oompa-loompas read these threads?