Welcome aboard! Gorgeous dragons!
I would, however, separate your dragons. They are solitary animals and can be aggressive. The picture of them piled on top of each other is actually a show of dominance. The one on top is the most dominant, and she's getting all of the heat and UVA/UVB rays, whereas the ones on the bottom are not.
Here's a great care sheet for them:
http://bearded-dragons.com/boards/index.php/topic,8.0.html