Well guys I have known how to do this for a while but for those that dont i figure i should make a nice picture guide on to how, this is getting on top of the inn roof in Gadgetzan. Please dont flame (i knows its your guys favorite pastime) but im new to exploring and just trying to contribute... here it goes!
First you want to start out at the first red dot. Now your trying to get on the lower tent, and i think what happens is you actually jump on those boxes below it (the secound red dot). Then from there you jump on up. It takes a few tries.
Once you get up there you want to move to where my toon is on the secound tent. You want to get on that pole but just infront of that little band. Then when you jump you are aming for the very tip of that big spike that comes out of the wall.
And BAM your there! And rember it takes a few tries.
Also it helps alot of you have something that can make you run faster like aspect of the cheetah for me. You can do this with a mount too but i just find it easier without.
Enjoy you guys and happy exploring!