Dr. Spock - A website from the most trusted pediatrician himself. Informational topics range from pregnancy to school age children.
Family Education - A great resource for parents on issues like: health, fun activities, learning, and parenting advice. The site is set up by age, and also provides expert advice and advice from other parents.
Parenthood Web - The WWW community for parents and prospective parents, focusing on childcare and parenting issues.