Originally Posted by Digital_Utopia
Considering that the vault isn't available to the game until you visit a Vault NPC, chances are if this access were implemented, it would only be able to be accesed when you were talking to such an NPC.
I beg to differ. Take a look at the plugin AltInventory. Once Turbine provides a way to access the player's vault at the vault NPC, a plugin can be written to remember what's there and provide a read-only view to the player and their alts away from the vault NPC.
The key roadblock here is Turbine supplying a Lua interface to the vault.