Raising an Atheist

[Casca]

My wife and I are having our first child soon (she's due last week of December). We fully intend to raise our daughter secular, but I am unsure of how to handle social situations when she gets older: like if her friends are religious, or if she's excluded from social gatherings because of it.

Do you have children, and did you raise them Atheist? Did you run into any obstacles?

If you don't, what would you do? Religion, no religion, or expose them to everything and let them decide?