This is my first edit, so be nice
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Basically, the usual wall jumping on both sides of the front of Orgrimmar have been made simpler by smoothing out the walls so now you can just run up to the Arena and the roof. On the left side you can now easily walk up to get to the rope and be on top of the tower on the front gates.
Another main feature is that you can go under Orgrimmar via a "basement" type walk in which is east of the entrance if you are looking at Orgrimmar from the outside. From here you can go into Uninstanced RFC (not a lot btw) and into the back part of the Auction House.



Some screen shots of the overviews:
This is a view on the left(west side, looking at Org). You can see that you can reach the rope now easily.

This is the right side(east, looking at Org). From here you can run up the path and jump onto the tower, or follow the path up more and get to the Org Arena area easier.

This is a view of the "basement" entrance.

This is where you get into the AH.

This is how you get into Uninstanced RFC.

Just to let you know, on the left side there is a little error in the terrain where there is a gap, but whenever I tried to fix it, it would just be there again but in a different way. So don't fall into it
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Also, the white "snow" in the screen shots don't exist in the game. It's just from the editor.
DOWNLOAD:
Code:
http://rapidshare.com/files/93099234/patch-8.mpqm
http://www.megaupload.com/?d=OF3ONF1P
http://files.filefront.com/patch+8mpq/;9662320;/fileinfo.html
http://frozengaming.com/f/patch-8.mpq (direct link supplied by my web host)
Enjoy