The social networking site LinkedIn offers many opportunities for nonprofit organizations and professionals to communicate, connect and collaborate.
Find out more about how your organization can leverage this tool at the LinkedIn Learning Center, which offers a list of tips and best practices: http://learn.linkedin.com/nonprofits/
In addition, for highlights of LinkedIn's relatively new Nonprofit Solutions program, read this blog post from SocialBrite.org: http://www.socialbrite.org/2011/07/13/highlights-of-linkedins-new-program-for-nonprofits/