[Edit: As of Feb. 27, 2010, WordPress can post directly to Facebook. The following post is now obsolete.]
WordPress can post directly onto Twitter, and Twitter can post onto Facebook via an application. This is an experiment to determine whether or not, through Twitter, WordPress is able to directly post onto Facebook.
Update: A link to this post appeared instantly on Facebook, so this two-step method of WordPress-Facebook integration does work.
Of course, Facebook’s Note application has the ability to import external blogs’ RSS feeds, but it creates a note and does not actually go to the blog. The Twitter approach, on the other hand, gives the blog post title and the short link to the actual WordPress article:
Notice too that, even though this method uses Twitter as a middleman, neither the original WordPress article nor the resulting Facebook status links to the Twitter post. Hence, even a totally inactive Twitter account can be used for this method of WordPress-Facebook integration.