This plugin is compatible up to 3.8.2. I have also successfully integrated it with the new 2.x.x series of OpenId libraries from here:
http://openidenabled.com/
You can get this plug-in working with the 2.0 library by changing line 25 of the "login_failure" plugin from:
Code:
$return = $auth->complete($_REQUEST);
to:
Code:
$return = $auth->complete($_REQUEST['openid_return_to']);