from BrianSolis.com:

The Business Guide to Facebook Part 1: Your Brand Page for the Social Web

Facebook is, at the moment, the most important social network in the world. Over 500 million people connect to one another in the “Social Network.” And, with the introduction of the Open Graph, we are interacting with our Facebook connections on our favorite websites where our social graph and the corresponding activity of Likes, interaction, and commentary become the centerpiece for social curation and more importantly, our focused attention. We are putting our social network to work and we are learning how to share, discover, and collaborate in public.

… Facebook is a sparkplug for word of mouth and when engaged, contributes to the end of business as usual and the beginning of social commerce.

… By this time next year, you as a brand or as a brand representative, will spend more time and resources on Facebook than you will on Twitter.