SCBWI Tri-Region of So Cal Schmooze is a great group that is part of SCBWI (Society of Children's Books Writer's & Illustrators).  They have a wonderful blog and post a good deal of awesome information. I selected the November meeting because of the resources listed. So this is a site you might want to visit often if you like to write children's lit.

Submitting our work to trades, magazines, and educational resource publications.