This sounds pretty sweet:
“We’re going to have a lot of raid instances in Wrath of the Lich King, but rather than have some of them 10 person and some 25 person, all of the raid instances will use our heroic dungeon technology to be 10 AND 25 person instances.”
That's gonna be awesome.
Just thought i'd quote a couple things from mmo-champion.com
Inscription
Inscribers will create glyphs that allow players to modify their spells and abilities. (Eurogamer.net)
Going by the first recipe, which requires Peacebloom, they'll rely on the herbalist gathering profession. (Eurogamer.net)
Every player will get a new spell book page to which they can add six glyphs - currently, four major and two minor. (Eurogamer.net)
Major glyphs will be effective in combat - adding damage over time or stun to a physical attack, for example - while minor glyphs will give convenient or cosmetic improvements, removing the need for some spell reagents. (Eurogamer.net)
Glyphs can be sold at the Auction House (Eurogamer.net)
Enchanting
Allowing enchanters sell their enchantments at the Auction House is still planned.(Eurogamer.net)
Lake Wintergrasp / Vehicles
The new vehicle technology, which introduces physics and handling characteristics - including inertia, turning circle, grip and suspension bounce - to land and airborne vehicles and special mounts. (Eurogamer.net)
It also allows for up to eight passengers per vehicle, and brings up bespoke action bars and skills for vehicle and turret operators. (Eurogamer.net)
It was intended to be used solely for PVP siege weapons - Dwarven steam tanks, Forsaken plague spreaders and Orc demolishers. (Eurogamer.net)