Variety is the key to a healthy frog. I use crickets, roaches, nightcrawlers, locusts, mealies, supers, etc for staples, and then the occasional rodent.
In the wild these frogs might come across a couple hundred different prey items in a single night while foraging, so the bigger variety we can offer them the better.
Be sure to post pics of yours when you get it. Here is a basic care sheet for them.
http://www.frogfreaks.com/index.php?topic=67.0