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There have been no commits in a year. Currently the D7 branch doesn't work completely without a few patches being applied, which is an impediment to it being used more widely.
http://drupal.org/node/1512328#comment-7668531
http://drupal.org/node/1673150
Comments
Comment #1
apadernoComment #2
apadernoThis is duplicate of #1673150: Is OpenID Selector still being maintained?.