Made export records from the blog on Facebook. Now, each blog entry if you wish to be published on the FB in the form or writing on the wall or notes. Along the way, refined and the process of commenting on these records - if the user has activated FB-Site account, then his comments would get as comments to the appropriate entry in FB. In general, all the usual bun.
Now the main journalistic activities would own blog and facebook LJ more and more becoming like a garbage dump, and spam - do there is virtually nothing except to read a stubborn hedgehogs and leave commentaries 1-2 per month.
I remind you that a blog can be successfully commenting or registering directly on the site or connected via Facebook.