I've been doing this for a while, but not always on purpose. My frog and newt tank is filled with all sorts of creatures that eat decaying organic material and mold. It is very warm and humid in there and I almost NEVER see mold growing. Springtails, book lice, mites, snails, worms, the all eat the stuff I don't want in the tank. Obviously, you probably don't want anything that feeds on living organisms, like some snails, aphids, parasitic mites, or predatory insects. It's great though, everytime I can see one of the frogs dropped a turd, it will be covered in springtails for a couple days and then completely gone. Little organisms like these can save you a LOT of time and work, and not to mention maybe even some of your ant colonies.
I have a giant springtail culture, and I'm thinking of starting a book lice culture too. Springtails are great for very wet conditions, and book lice are great for very dry conditions. They both love to eat mold. I've actually watched them in my microscope just feasting on it.