Cataclysm World Events - phase 4

The battles in Orgrimmar and Thunderbluff have begun!  Every 2 hours 15 minutes some portal spawn and you have to kill all the mobs and then you can open some instances which drop some level 251 gear.  I did 2 of the instances last night but I didn't get to do the orgrimmar ones.  I haven't yet seen the event myself, hopefully will get to try it in the next few days.