Dual Monitor Support
I would like to see AO support 2 monitors in future. This allows us to put the side panels onto the second screen and make more room for playing.
Resizeable gumps
Perhaps the chat box and all the gumps can be resized too and moved.
I find the trade windows etc quite fiddly to use with the tiny scroll arrows and so on.
A resizeable Inventory and Bank window will be much easier to use and lessen the constant scrolling needed.
eg when trying to combine say ammo in the bank with ammo in your pack, you need to scroll to the right place, remove all the ammo from bank, pick it up and scroll to the inventory window to find the matching ammo and then combining it.
And then put it all back into the bank too! quite cumbersome!
Player Vendors
Player vendors accessible using the normal shop interface will be great. I envision that players wishing to purchase or check the stock of another player just does a "search" for the player name.
Then the terminal will "connect" with the sellers "sell-list"
since all players have a unique nickname, that will be sufficient to locate a particular vendor.