sup, heres some exploration from today, basically a new way into zg uinstanced and stv cave, and a way into nightbane room @ karazhan etc. you'll need slowfall and rocket boots extreme, not sure if the normal one works.
heres where you start, just run up the hill there
http://i43.tinypic.com/1ouckh.jpg
heres the start but on map
http://i39.tinypic.com/2qdobhf.jpg
just make a simple jump with your mount to the rock and run up
http://i42.tinypic.com/2pzlb45.jpg
you will come up here, once again just jump with your mount as the arrow shows, then demount and jump the last bit
http://i42.tinypic.com/294t1yg.jpg
you will come up here, you can rocketboots slowfall and jump down to nightbane room.
http://i41.tinypic.com/2ba7lt.jpg
pop rocketboots and aim for the edge, there's an invisible wall at the cross which you can stand on
http://i43.tinypic.com/f0q1zm.jpg
here's me standing on the invisible wall, just jump while running forward as the arrow shows and you'll get up
http://i44.tinypic.com/70yt80.jpg
you're done, just keep running the obvious and only way forward. once you get out of the mountains you can either run left (for stv cave) or right (for zul'gurub) or just climb up at one of the big rocks and rocketboot into this room @ kara
http://i43.tinypic.com/2hcm89v.jpg