senseloss on "Is there a plugin to make my blog private for facebook friends only?"

I want to have a wordpress blog that is completely private which requires login to view it, uses facebook to login, and only allows my facebook friends (even after login) to view the content.

I've tried searching google and the plugins area, I can find plenty of things to interconnect with facebook, but nothing to make the blog private to facebook friends only.

Any recommendations?

Thanks.