I have three sons, ages 21 (with my ex-husband), 9, and 8 (with my current husband). When my first son was born, my ex and I discussed it at length, and decided to have him circumcised just because most babies were. I never felt quite comfortable with that decision, it just felt wrong to make a decision for him that involved pain and alteration of natural body parts. I would feel the same way about getting a baby girl's ears pierced, although circumcision is more serious than that in terms of trauma to the baby (I watched it and it was not painless).
For my two younger sons, it didn't take much discussion for my husband and I to agree that we wouldn't have them circumcised, and I have always felt good about that decision. If they want to be foreskin-less, they can choose to do something about it when they are old enough. Along with other body-modification like pierced ears and tattoos.