A while ago the All-American Rejects asked if they could use actual PostSecret postcards in their music video. I suggested they make a donation to HopeLine (the Suicide Prevention Hotline) and they did.
After they shot the video, they generously sent me all the billboard secrets they used as props. Many were sold with proceeds going to HopeLine.
One surprise I had when I watched the video was that each member of the band created one of their own PostSecrets and included it in the video anonymously.