Civil rights activists are turning up pressure on Twitter to publicly release the gender and ethnic breakdown of its flock of employees. And they're doing it by waging an attention-grabbing campaign on Twitter.

Rev. Jesse Jackson's Rainbow PUSH Coalition and the civil rights organization ColorofChange.org say they will use Twitter as a bullhorn to call on the San Francisco company to share demographic information about its work force and to host a public forum on how it plans to increase the diversity of its staff.

At a session on Twitter at the Netroots Nation annual political conference in Detroit on Friday, activists will ask people to "tweet out" to Twitter. ColorofChange is also asking its 1 million members to sign an online petition to add their voices to the campaign.