Good article I found on New York Times.

A growing number of businesses are making Facebook an indispensible part of hanging out their shingles. Small businesses are using it to find new customers, build online communities of fans and dig into gold mines of demographic information.

“You need to be where your customers are and your prospective customers are,” said Clara Shih, author of “The Facebook Era” (Pearson Education, 2009). “And with 300 million people on Facebook, and still growing, that’s increasingly where your audience is for a lot of products and services.”

Read the rest of the article here