I love Emily Prentiss THIS MUCH, and I wanted to make a wallpaper that somehow conveyed at least a little of her awesomeness. Only available in 1280x800 size right now, unfortunately, as I no longer have photoshop installed on my computer and can't access my layered originals.
Click the preview to head over to my journal:

Background and brushes from
oxoniensis, I believe, the photo of Emily from a promo picture for season three, and the text was chosen after reading a few discussions over on
matociquala's journal. Enjoy!