Check out the LLL Breastfeeding Answerbook. There is a chapter on
Breastfeeding Multiples and a Bib at the end of the chapter. Also look at
Karen Gromada's Mothering Multiples. And lastly, Jane Bradshaw who is on
lactnet gave our BF Consortium a great lecture on Breastfeeding multiples. I
don't have her e-mail but maybe she will see this and give you more guidance.
Good luck