If you’re a Christian, check out the Gospel Coalition Network. It’s not a substitute for Facebook, but can be an excellent supplement and resource. It’s still in its infancy and needs more folk who are willing to be contributors.
The Gospel Coalition Network (TGCN) is a fellowship of Christian churches, organizations and individuals who want to align themselves and their institutions with the confessional stance and vision of ministry of the Coalition. This network aims to coordinate those who are committed to a certain kind of ministry—that which is biblically-faithful and gospel-centered.
The purpose of TGCN is to unite a broad range of pastors, churches, and Christian leaders who are committed to the same foundational beliefs as TGC; to provide a database of such brothers and sisters in Christ, to foster regional encouragement and support, and, where possible and helpful, both formal and informal associations; as we expand, we aim to provide leadership and resources to such co-workers.