Fen just tipped me off to an awesome event. There is a new pre-Cata event has elementals invading SW and IF every couple of hours. Each time the city succeeds and you are in town you get the ability to que in to 4 dungeons (2 for each town) for a half hour. The boss in each dungeon drops a 251 item. You can require each dungeon as many times as you are able in that half hour period.