I read a post on Blendernation, a cornerstone of the Blender 3D community, that I felt bared repeating--for two reasons.
First, Colin Levy (Peerless Productions), created a 30 second public service announcement (PSA) as an entry for PSAId, a contest sponsored by the Center for International Disaster Information (CIDI). It's very impressive and has a strong message; no wonder it was a finalist. You can view his entry here.
Second, because he uploaded a video on how he used Blender 3D for camera mapping in order to create the proper setting for the scene. He also has a full camera mapping tutorial on his Web site.