I really, really, really, LOVE CRZ.
My guild has a notorious reputation for ganking everyone and everything, now that this has happened... holy poop. It gets INTENSE in the world. We had at least 5 full 40 man Raid Groups assembled and lead by our guild (with random people in the world and other servers of coourse) and just out to defend our Horde. You guys may not like it, but for us Vanilla Veterans... man, it felt fucking GREAT! It was just a massive war at the Dark Portal one night, just mayhem. It was a truly glorious experience, something that had died a long time ago.
Now it's back and it's kicking ass. Guess how it all started? Alliance ganking our Horde Alts, the Horde getting friends, those friends getting friends, those friends getting friends, random people typing in local defense, people typing in Trade, people typing in General chat. Guess what? The Alliance did it as well and it was such an epic battle with OTHER full Raid groups not coordinated by us participating.