Isle of Quel'danas was somewhat like the AQ event, only much smaller and wasn't required to open up Magisters Terrace and Sunwell.
I know that event was pretty good, and people actually had to do the quests and dailies in order to capture the isle, open up new dailies and work towards a Shattrath portal to the Isle among other things.
Pretty surprised that WotLK didn't really have an event like that.
Dreadmaul US Horde - "Dragonsworn of the Bronze Flight"