May I suggest keeping this website in mind for dart frog information? www.saurian.net
This is Patrick Nabors website. He raises and breeds frogs and has supplied zoos all around the country with frogs. His expertise is impeccable and his knowledge is great. He is also an all round nice guy! He sold me my three new d. auratus (which, by the way, are fantastic) and is willing to answer questions, if you're a newbie like me.

Good luck to you!