As we approach the end of Childhood Cancer Awareness Month, insurance giant Aflac’s never-before-seen matching donation program with Causes on Facebook is still going strong.

Aflac is donating one dollar for every person who joins the cause and will match donations from now through the end of September or until they reach their million dollar goal, making it the single largest donation made through a social networking platform to date. Aflac Chairman and CEO Dan Amos kicked off the campaign with a personal donation of $100,000 and challenged others to contribute to the fight against childhood cancer. The response to Aflac’s campaign has been overwhelming, with letters of praise penned to Aflac’s Amos directly and countless others expressing gratitude for the support that’s been shown by Aflac for those battling childhood cancers.

With a week left of the campaign, Aflac had recruited almost 670,000 people to join the cause and raised more than $500,000 for the Children’s Healthcare of Atlanta Foundation.

This Aflac campaign, like recent Target, Snickers, Microsoft and Kellogg’s campaigns, leverages the power of social media to not only mobilize personal relationships to create positive change, but acts as a platform for companies and brands to communicate with consumers about their commitments to philanthropy. Look for Causes to launch a half a dozen more programs, each with their own unique experience, in the weeks to come.