Facebook has been building out its Pages product for businesses, brands, and celebrities since last year — and as the site has boomed to well over 300 million people, Pages have become an increasingly important way for any organization to reach users. Sensing opportunity, a number of companies have been starting up or expanding to provide services for Page owners.

"In an age dominated by social media where personal photographs are ubiquitous, it becomes important to understand the ways personality is communicated via our appearance," said study researcher Laura Naumann of Sonoma State University. "The appearance one portrays in his or her photographs has important implications for their professional and social life."

With so many Facebook applications how can you tell which ones are right for you? 5 Useful Facebook applications that you will use.

Because of my new book, Facebook Marketing for Dummies (Wiley), which is launching next week - I have been getting a lot of emails and questions from my readers that are very focused on launching their Facebook and Twitter presence.