@drq @evan @bradfitz Also, LiveJournal added support for cross-server federation of post content (via RSS) in 2002. It added a standardized feed of your social graph in 2004. It created a system for distributed identity (Yadis, later OpenID) in 2005, to allow users to engage on other servers without having to create new accounts.
Yes, it didn't specifically use a spec collection that launched in 2011. Because it lacked a time machine :p
https://news.livejournal.com/58000.html // https://lj-dev.livejournal.com/683939.html