American Academy of Pediatrics
http://www.aap.org/

American Board of Pediatrics
http://www.abp.org/

Archives of Pediatrics & Adolescent Medicine
http://archpedi.ama-assn.org/

Pediatrics in Review
http://pedsinreview.aappublications.org/

Journal of Pediatrics & Adolescent Medicine
http://www.medical-library.org/j_ped.htm

eMedicine - Pediatrics
http://www.emedicine.com/ped/index.shtml

Medscape - Pediatrics
http://www.medscape.com/pediatricshome