>When one system dominates a particular domain and locks users in, problems seem to naturally ensue. Unfortunately for privacy advocates, an open Linux-like system will have much more trouble coexisting with Facebook.

There are countless open source packages in this domain and countless people that run them or use them. Just how I like it, decentralized.

For example: Reddit, Status.net, Buddypress/Wordpress, Pligg, Elgg