You can post your blog posts to facebook note application.
In fact, because process involves RSS these are short introductionary or teasers. So you could generate traffic using this system.
Keep in mind that you can't control whom to share, your friends, family or collages.
Search for notes in facebook.
Click to enter applications main page.
There you'll find adjust import settings or import settings.
Url is http://www.facebook.com/editnotes.php :)
Enter your blog's feed
If you trouble with your blog system, search for RSS.