Recently I joined a social network just for people touched by adoption. Here's an excerpt taken directly from the website:
"Welcome to AdoptionVoices, the adoption social network! As a member of AdoptionVoices, we want you to have a safe place to share your story and ideas with others who understand and care as well as learn from other members of the adoption triad, advocates and professionals."
So far, it is a great place to socialize with other adoptive parents and even birthmoms.