I hear good things about the Diva Curl line.
I found a product at Whole Foods called Beautiful Curls. All of the products are natural and the oils are absorbed so it keeps the hair moisturized. My son is AA/white with fine hair, tight curls, and it works great on him. I've also used it on my fine & curly hair and it works well.
http://www.beautifulcurls.com/store/pc/catNurture.asp?idcategory=4
Another option is to put her hair in a ponytail type bun at night when it's wet and let her sleep with it that way. Do a leave-in treatment and it helps with frizz in the am. There is a little girl at daycare with super curly hair and her parents do this.