Moms with Apps (@momswithapps)- I learned of this site from @dkapuler. It is updated on a pretty regular basis and the purpose of the site is to "promote quality apps for kids and families".
Best Kids Apps - I love the tagline on this site, "We play all the iPhone, iPad, and Android apps so you don't have to". The apps are given a grade, age rating, and the price is displayed.
Apps 4 iKids (@Apps4iKids)- This site was created to share apps that a mother has found for her son. Lists are included from various perspectives including her son's (5 yrs old) top 10 picks.