i agree with satanic intention... cypress mulch is good stuff. it looks really good if you're using a terrarium setup, and is way cheep when compared to the expensive name brand stuff. plus, it's great at holding humidity, and without too much danger of molding. i use it in the tanks for all three of my kids. like SI said, make sure you bake it, just to make sure; also, you might want to sift it if it's particularly dusty. the dust can get stuck between their scales, and it's probably not too good for the snake lungs.

congrats on the new addition to the family, and welcome to the site.