Idealware has published the free Nonprofit Social Media Decision Guide, which is meant to give nonprofits guidance about how best to use the social media arena.  I haven't had a chance to read it yet, but Idealware tells us that:

The Decision Guide walks through:

• What social media is, and why it might be useful for you
• How your goals, audiences, and metrics should drive the decision making process
• Specific information on the tangible value nonprofits have seen in using Facebook, Twitter, Blogs, Photo Sharing Sites, Video Sharing Sites, and more.
• Choosing an effective social media mix
• Integrating all your communications
• A workbook that helps you walk through all of this for your own needs
• And a Consultant Directory to find a professional to help you take the next step! 

Download your own copy here.