facebook/open-graph-protocol — pull request #17 by niallkennedy (2012-01-19 19:07:51+00:00)
Title: Link to mixi developer center instead of mailing list announcement.

Mixi has a developer page documenting their use of Open Graph protocol. Better link than a mailing list entry announcing support.
http://developer.mixi.co.jp/en/connect/mixi_plugin/mixi_check/spec_mixi_check/

Facebook link was missing a trailing slash. added that in too.