When im doing lot of things in same moment, like trading, talking with friends and guildmates my chat window is getting really messed up, there are diffrent colors and posts everywhere and you loose all track of conversation.

Thats why i though that it would be very helpful to have each channel in separate tab. You could switch between genera/zone tab, trade tab, guild tab and /tell tab or tab for every person who send you /tell.

This would help in keeping track of conversation and make your chat window cleaner.

Also it would be nice to have ability to extend chat window, its helpful while you just chill in game, talk with people and you are more focused on conversation than on watching what is happening on screen.