I am concerned I might be underfeeding her. Also, I noticed the peat moss in the cage is dried, any thoughts on this? How often should I be misting the cage?

Here are two snaps I got, should of got some while I had her out of her cage.

http://i49.tinypic.com/zx8ugj.jpg

http://i49.tinypic.com/30vhvfp.jpg

We keep our Avicularia mostly dry and use the biggest water dish we can fit in the enclosure,and then restrict ventilation.I mist MAYBE 1 time a week,tops.Avicularia can handle lower humidity than most think once they are past the sling stage.....Don't worry about your avic,odds are it is fine. I noticed that more people kill their avic's by over caring for them.Give it the basics,don't worry if you miss a misting or three,and just keep the water dish as full as possible.This will also help control any nasties that may be present in your soil.