There are some new user titles to be introduced with the expansion. A lot of these will be server first achievements. WTB Archmage Gaiwyn. XD
A couple of other things of note. Firstly, I remember reading about faction championing a while back. Information has been released regarding factions you can champion as you run instances. All you have to do is wear the tabard of your choice of faction to gain reputation with them. For the Argent Crusade, Knights of the Ebon Blade, Kirin Tor, and Wyrmrest Accord, all reputation gains while in level 80 dungeons and wearing their respective tabards will be applied to your standing with them.
Leatherworkers will be able to apply item enhancements that act as enchants. The same will also probably eventually apply to Blacksmiths and Tailors.
Gaiwyn of Proudmoore