I know of a great forum dedicated to wow
Here
Slow, unstable, shitty forums at that!
While I do agree it's probably the best community for WoW, I'll also state that it's the most frusturating to use. There are a lot more member using it, so chances are you're going to run into a lot of people you "butt heads with." Additionally, I can't log in most of the time and they're generally slow as hell.
Say no to Blizzard's WoW forums!
Will do, Furious.