The idea for this mod comes from the ability of Banknon to remember what you have in your bank and display it when you're not at the bank. I know even though it's against the TOS that I am not the only one who lets a friend play his character, and this is where the mod would be useful. I'll try to explain in a timeline fashion what the mod would do.
I log off of my character--
The mod has a record of durability, inventory including amount of gold, faction reputation, position, and a list of characters in the guild.
A friend tanks an instance for the guild on my warrior--
Makes 16g from mob drops, increases rep with Sha'Tar, looses durability, leaves 3 green items in the bags, uses 1 earthan elixer, and he logs off outside of Mech.
Late that night 1 person gquit.
I log back on the next day--
A summery screen pops up and says
+16 Gold found
1x Item(s) missing from inventory [Earthan Elixer]x1
3x Item(s) found in inventroy [Random Green] [Random Green] [Random Green]
Durability changed from 100% to 70%
Reputation with The Sha'Tar increased from 6090 to 8987
Character moved from Shattrath City to Vortex Fields