Join us Tuesday, June 23, at noon Eastern time for an encore to our recent discussion on the best ways for nonprofit groups to use online social networks. We’ll continue the conversation about how you can ensure that your organization stands out through online networks such as Facebook, Twitter, and LinkedIn and explore how those tools can complement traditional marketing efforts.

You’ll also learn how to teach your organization’s leaders, staff members, and volunteers to speak with a unified voice when they seek contributions and talk to others about your organization’s mission.

Our guests will be:

Danielle Brigida, the social-media outreach coordinator at the National Wildlife Federation, in Washington, where she manages the organization’s voice on online networks such as Facebook, MySpace, Care2, Change.org, Digg, and StumbleUpon.

Wendy Harman, the social-media manager at the American Red Cross, in Washington. Previously she worked for the Future of Music Coalition and was a law clerk at Volunteer Lawyers for the Arts of Massachusetts.

Nancy E. Schwartz, a blogger at http://GettingAttention.org and president of a New York City-based marketing and communications-consulting firm that bears her name.

The Chronicle’s online discussions are free and open to everyone. People who ask questions in advance have a better chance of getting answers.