It's well worth reading for nonprofits too. For instance, take this great advice:
Some basic rules: Buy-buy-buy messages won’t fly. The best practitioners make Facebook less about selling and more about interacting. Engage with fans and critics. Listen to what people are saying, good and bad. You may even pick up ideas for how to improve your business. Keep content fresh. Use status updates and newsfeeds to tell fans about specials, events, contests or anything of interest.
You can read the whole article at: How to Market Your Business With Facebook.