I have a contact at our local CBS affiliate, and she checked on the possibility of having a PSA run for the walk. Unfortunately, they can only do it if we have a pre-produced spot (30 sec.) that we can provide. Since I haven't heard anything of the like, I assume one's not available, but I thought I'd check, just in case.
If we don't have one in place for this year, I think we should definitely consider it for next year. Something canned that we can send to all local affiliates would be excellent, and I bet we could even get a film student to do it as a class project. (Several of my coworkers at the store are film students at the Art Institute of Atlanta.) Of course, it would take time and planning on our parts to develop what we want to say...so I guess that's for next year. [:D]