Glad to hear it! 
I also had a great time.
I’m somewhat fortunate that my own realm was late to open our gates, so that I actually had a chance to participate. (I was working during the initial gate openings in each region, as you might expect).
My own realm was crowded enough to trigger the teleport code, and I got bit by a bug that caused the teleports to port out random players instead of the last people to enter, so even though I was online and at the gong hours ahead of time, I was ported out just before the gong was actually rung.
We found the source of that bug, and it will be fixed soon, but we can’t go back in time and prevent it, of course. Still, my guild made the best of it, and somebody who was still in Silithus streamed the gate opening to the rest of us so we could watch while we got ready to farm the crystals at other locations in Kalimdor. We had a pretty good time with the mind-control mechanic allowing us to attack people trying to steal our spawn. Of course, we also occasionally killed each other by mistake.
We were able to return to Silithus after about an hour once the population calmed down, and overall I had a really good time participating in this once-in-a-realm’s-lifetime event. I hope you all did too.