Booklists and reviews that I have been using to keep up with current trends in children's and YA literature:
***The Brimful Curiosities blog has links to many lists of bestselling children's books including those of independent and online publishers and Christian books:
Discover Bestselling Children's Books
http://www.brimfulcuriosities.com/2009/12/discover-bestselling-childrens-books.html
***About.com has lots of themed lists and reviews plus a children's book blog by subject guide Elizabeth Kennedy:
About.com Children's Books
http://childrensbooks.about.com/
***blog like a librarian***