-The plugin needs the `Net::OpenID::Consumer` perl module. The
-`LWPx::ParanoidAgent` perl module is used if available, for added
-security. Finally, the `Crypt::SSLeay` perl module is needed to support
-users entering "https" OpenID urls.
+The plugin needs the [[!cpan Net::OpenID::Consumer]] perl module.
+Version 1.x is needed in order for OpenID v2 to work.
+
+The [[!cpan LWPx::ParanoidAgent]] perl module is used if available, for
+added security. Finally, the [[!cpan Crypt::SSLeay]] perl module is needed
+to support users entering "https" OpenID urls.
+
+This plugin has a configuration option. You can set `--openidsignup`
+to the url of a third-party site where users can sign up for an OpenID. If
+it's set, the signin page will link to that site.