Topic Trade Forwarder
This mod allows you to see trade from anywhere as long as someone in a city has it. The more people using it on your server+faction, the better it works.
More people should get it. You never know when someone will offer up something nifty for cheap. Or put together that group for that one place you really wanted to go.
Also great for amusement while doing tedious and monotonous things such as Arch, farming, or questing on an alt.