I wouldn't try petting her in the viv... Just asking for trouble IMO. I had/have an extremely feisty girl I've been dealing with for the past 8 months or so. You definitely want to get it under control before she gets too much weight on her. What worked for me was basically giving her about 5% open floor space, everything else is filled with clutter. I have a bushy plant in the front (she was striking the front of her tub HARD every time I walked by), along with her water bowl and a hide smushed in there. Then I have two more hides at the back, and another in the middle. Any free space left is packed with fake plants. I keep her entire tub covered with a black pillow case. I would start with handling her every day for a few minutes. She'll eventually start to settle down and realize you're not trying to kill her. This has worked wonders for me. Now I only get the occasional hiss when I pull the hide off of her.
Here's a cool vid on dealing with aggressive hatchlings
http://www.youtube.com/watch?v=S7DQssbM0uk