Podcasts:

Picturebook Look
The Manuscript Academy
Literaticast
The Children's Book Podcast
Writing for Children
Kidlit Thesedays
Picturebooking
One More Page

Good kidlit information:

Kidlit.com
Kidlit411.com
Literary Rambles

Authors offering paid manuscript critiques:

Deborah Halverson
Vivian Kirkfield
Kirsten W. Larson