This is footage of a live server, not a private one.
This is nothing new for most players who watch WoW videos but this proves that you can still get down there as of October 5, 2008 on non-private servers.
A Warlock's summoning portal can be used (clicked on) to summon more inside. You can click on the portal through the Door in the King's Room that leads to 'underneath' IF. Party/raid members can click on it and you can summon an army if you want.
There's no fancy editing here, just wanted to share the footage.
As always, download for the best quality. Thanks for any ratings.