World Wide Web Resources

Guidestar generates and distributes extensive programmatic and financial information about more than 1 million American charitable nonprofit organizations. It operates a free public Internet service.
http://www.guidestar.org

The Internet Nonprofit Center is the home of the Nonprofit FAQ. The FAQ is based on "frequently asked questions"—and their answers—drawn from the 'Nonprofit' email discussion forum and other online resources.
http://www.nonprofits.org