WordPress rocks. Here’s a plugin for bringing your WordPress blog posts into Facebook, and enabling users to comment and share those posts.
WPBook Lite is a simpler version of WPBook, which removes the canvas display aspect, thereby avoiding the need for HTTPS access to your blog (a requirement Facebook imposes on canvas producing apps).
See WPBook and WPBook Lite for more on the differences between them.
See the WPBook site or the plugin page at WordPress.org for up to date info
Download WPBook Lite from the WordPress plugin directory.