Ability to copy chat.
i second this especially if you want to show a picture in a hurry but you cant because of this.
There is already a thread for this, but I have grown weary of trying to aid moderators who are too busy picking their noses and handing out infractions to merge threads.
You should also be able to:
a) copy from mail
b) have the option to enable clickable links
c) have a chat log
Bumping this suggestion. Small thing that should definitely be in game.