I recently discovered Baby Blues Comics and their take on breastfeeding. It is refreshing to see that breastfeeding is considered as the "normal" source of nutrition for baby instead of milk from a bottle. I've linked the relevant strips in the Baby Blues Archive:
Slinging and feeding - April 6, 2009
Milk Warmers - February 11, 2009
No Time - November 15, 2008
Hands Full - August 8, 2008
The Power of BM - August 5, 2008
Bull's Eye! - December 8, 2007
Momivore - August 23, 2007
Pool Pumping (from 10 years and still in diapers, Baby Blues compilation)
Baby's Faves - August 24, 2006
Baby's Faves - January 30, 2006
Ouch - July 14, 2005
Busy Mom - April 24, 2004
Nosy - December 15, 2003
Trash those coupons! - July 27, 2003
Dinnertime - February 20, 1996
Solids Blues
Here are other comic strips on nursing
Nursing in Public (Rubes - April 24, 2008)
Sounds of the Night (American Elf - December 13, 2007)
Breast is best comics series (Ben)
Will be adding more links to comics as I find them.