There are several of social WordPress plugins in the WordPress community and new plugins are coming out everyday and here a collection of facebook plugins that will help you integrate facebook with
your wordpress blog.
Simple Facebook Link displays a link allowing you to share posts and pages with Facebook users.
You can display your Facebook friends status updates, posted items and/or notifications on your WordPress dashboard. Require WP 2.5 or above.
Enables members to log in to a BuddyPress enabled install with their Facebook account. Based on wp-facebookconnect by Adam Hupp.
This plugin adds a footer link to add the current post or page as a Facebook link.
Plugin to embed WordPress Blog into Facebook Platform.
The Gaboinked! Facebook Badge Plugin for WordPress easily displays a Facebook Badge in the sidedbar of your self-hosted WordPress Blog.
Facebook comments is a WordPress plugin that will import comments from your facebook notes back into your wordpress blog.
This plugin adds a footer link to add the current post or page to a Facebook Mini-Feed.
Fotobook is a WordPress plugin that will link to your Facebook account(s) and import all of your photo albums for use in your WordPress installation.
The Facebook Share Preview Plugin adds the required meta-data to an audio post so Facebook can embed your audio directly onto their site.
Integrate Facebook and WordPress with Facebook Connect. Provides single-signon, avatars, and newsfeed comment publication.
This plugin fetches posted items from Facebook and displays them in an unordered list with proper links and comments.
This plugin adds a link within each blog post to share blog posts on FaceBook.
QuailPress allows you to intergrate with Facebook Share so that users can easily share your posts on their Facebook accounts.