Make the Most of the New Facebook Profile

"If you want to feature yourself as an author at the top of your own Profile, click on the Edit Profile link in this area of your profile, then select Education and Work from the menu on the left. List your current employer as the name of your publishing company or business, and list your job title as "author of your book title." Be sure to check the "I currently work here" box. The word "at" that appears between the job title and employer name in this example is fixed and you cannot change it. You may want to experiment with this until you're happy with the way it looks."

http://bookmarketingmaven.typepad.com/book_marketing_maven/2010/12/make-the-most-of-the-new-faceook-profile.html