I have sugestion,what if xenforo create mods or addons to imitate FAcebook? I love xenforo forum, but it lack custom profile url, timeline like facebook, and chatting feature. Custom profile url : how about this , www.xyz.com/username without numerical character . Timeline , in twitter/facebook timeline prove powerfull feature to keep user addicted to our website. And Chatting feature, I know ity could be disctraction but it could lower our website bounce rate.