I couldn't find the thread about formula and breastfeeding being discussed at 3FatWomen (or was that 3 Fat Chicks? Anyway.). Here is a link to an article that states that formula fed babies are more likely to become overweight.
http://health.msn.com/pregnancykids/...42529>1=8404
http://health.msn.com/pregnancykids/...42529>1=8404
