Integrate Facebook and WordPress with Facebook Connect. Provides single-signon, avatars, and newsfeed comment publication. Requires a Facebook API K
A minimal amount of theme integration is necessary. Open the 'comment.php' file in the theme and add the following line where the Connect login button should be inserted:
<?php do_action('fbc_display_login_button') ?>
The reason for calling fbc_comment_login via do_action instead of directly is to avoid spewing errors if the plugin is disabled. It would be equally correct to directly call fbc_comment_login() here.
As a simple example, the comments.php file on my blog looks like:
<?php if ( $user_ID ) : ?>
Note that the fbc_comment_login function should be called regardless of whether the user is currently logged into WP or not. It will DTRT.
See config.php and the Settings page for more configuration and customization options.