Group Dynamics Facebook could reap a bounty of benefits for your business. Should you join?

After Alicia Rockmore's Ann Arbor, Michigan-based organizational products company, Buttoned Up Inc. scored shelf space at Target, Rockmore began doing research to keep the big red bull's-eye happy. A friend invited her to join social networking site Facebook, so she created an individual profile touting her business. She hit pay dirt when she found an existing group of Target customers on Facebook.

"They talk about what they like, what they hear is coming from Target," says Rockmore, 42. "It's like free market research." While she won't give specifics for competitive reasons, Rockmore says she adjusted the product line of her $1 million company based on Target's affinity for sharp looks and guest designers. She's optimistic that this will pay off in a big way.