Some internet resources on breastfeeding
Breastfeeding Helpline from the Department of Health and Human Services
Racine, LaLeche League chapter
Medications information while nursing: LactMed
www.breastfeeding.com
www.breastfeeding.org
Medications and breastfeeding from lactation pharmacology expert Dr. Tom Hale
The Ad Council : Breastfeeding Awareness
Breastfeeding — Best for Baby. Best for Mom.
...some of my stuff is on here, so it must be good ;)