Just a quick post today, via 'First Book', which attended a conference in order to shine light on the lack of diversity in children's literature, and highlighting their own goal in this space:
To expand diversity in children’s literature we are pioneering a market-driven solution. The First Book Marketplace is an online store available only to educators and program leaders serving kids in need.
There's an infographic contrasting actual racial groups of low-income children (US-centric) and matching that to their representation in children's books, and it doesn't look great (and yes I myself am guilty of this, having a white female protag in my own children's book).
Check it out here: http://blog.firstbook.org/2013/07/01/expanding_diversity_in_childrens_books/