Well actually males can be calico- but they aren't TRUE males.
It is possible, although very rare, for a calico cat with a male body to be born- what happens, is that the cat can actually get three sex genes: XXY. Which gives them the colouring of a female cat, and the body of the male. I don't think they can breed though... have to look it up. Read about it a long time ago... kind of interesting.
Either way, Katt (on Vanans account) is still right. There is a difference between calico and pied. I just thought I'd share the genetic male calico thing, because it's interesting ^_^