Pretty useless but fun:
Behind the tram's portal (the one leading to IF from the tram side) there's a gnomish letterbox that is left as a normal collidable doodad, and it's fully working, even as a horde.
To get there, you'll need a 'friend' of the opposite force to fear you through the portal, blink may work if you find the correct angle. I placed my level 1 potion mule there (doesn't need a bank)![]()