Kotaku has the merest hint of a rumor about a possible achievement system
coming with Blizzard's Wrath of the Lich King expansion. "You know what World of Warcraft players really need? Another reason not to get up out of their chair, and Blizzard might be giving that to them in the form of in-game achievements in the next expansion, Wrath of the Lich King. According to DeathKnight.info, players in the Wrath of the Lich King alpha can type /achievement to bring up a screen like the one above, which shows various achievements that can be performed for points, which will more than likely then go towards buying gear and such."