I checked and havent seen anything posted about this so sry if I missed it if there is one. Anyways I found a cool little island floating in the twisting nether south of veil shalas in terokkar forest. (Coords are 50,87) If you get low enough you cant fly over it unless you land on the edge and im pritty sure you have to slowfall onto it from above. When you land your camra gets stuck above your character so you have to look down (and when runing around its best if you hold the left mouse button or your camra will be spining alot and you might fall off). If you get on your flying mount you can fly to the edge of outland wich is past the invisible wall you normaly run into. If you do fly out there be carefull on the way back because I think I was flying down and flew to far and died. This isnt usefull in any way I can think of but its fun still.
http://i6.tinypic.com/4mv61b5.jpg
That good?