This means that public social networks--specifically and --are still the default enterprise tool that employees turn to for business. "This suggests that most employees discover the value of social for business not behind the corporate firewall, but through interacting with colleagues and clients in the public social sphere," Keitt writes.

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Content and collaboration professionals face a few challenges in creating a roadmap for social software: A small portion of the workforce has adopted these tools, and even that group is limited in how it uses the technology. Here's what Forrester suggests businesses do to focus its early efforts.

While many businesses on employees accessing public social networks such as Facebook and Twitter, that won't necessarily stop employees from using their personal computers and smartphones to access them, the report says.