By Allison Fine

Nonprofits are increasingly relying on social networks to keep track of and connect with supporters.

But what happens when one of these networks disappears?

Rumors recently began to surface that Yahoo would be shutting down del.icio.us, a widely used social bookmarking site.

Since then, del.icio.us has released a statement saying it isn't shutting down but instead is looking for other "fits"—in other words, a buyer.

But the uncertainty of this popular social network has raised questions about what would happen to its users if it were to shut down.

For this month's edition of Social Good, Allison Fine, the host, interviews Allyson Kapin, co-founder of  the Rad Campaign, and Michele Martin, social-media consultant, to discuss how users can protect themselves when social media sites transition or go offline.

Allison Fine, a nonprofit leader and expert on technology and communications, discusses how charities and foundations can more effectively use social-media tools to spread their messages and raise money. Ms. Fine incorporates suggestions and questions from readers into her podcasts and invites you to e-mail her at afine@demos.org. Look for new installments on the first Thursday of every month.