clipped from: ask.yahoo.com   
The location of the incision made to insert the implants and the skill of the surgeon play a large role in determining if the breast is still capable of producing enough milk. One lactation consultant states, "Incisions made in the fold below the breast rarely interfere with breastfeeding. Incisions made in the armpits -- if the surgeon is careful to avoid nerves -- are not likely to interfere." If, however, the nerves or breast tissue are damaged, as can happen when the incision is made around the areola, you may have problems producing enough milk. Occasionally, scarring from implants may also make breastfeeding uncomfortable or even painful.

We found many sources on the Web that echoed this claim, however, we also stumbled upon an article from the National Resource Center for Women and Families that states "any kind of breast surgery, including breast implant surgery, makes it at least three times more likely that a woman trying to breastfeed will have an inadequate milk supply."

Overall, many experts seem to feel that "the benefits of breastfeeding far outweigh any risk of problems" and encourage women with implants to try breastfeeding. And a number of resources are available, both online and off, for women who encounter problems.