I always wondered if this case had ever been solved. It seems as though there's been a de-briefing update sort of, yeah they're hanging your panties on a bridge somewhere, gawd I need pictures.
Update: The August 2011 mystery of thousands of panties dumped along an Ohio road was never solved by the local authorities. Folks were interviewed, but nothing definitive was ever nailed down. Fairfield County, meanwhile, has held on to the garments. For, um, police reasons. Yeah.
Anyway, the undies will go to good use: they'll be donated to a group that hangs underwear on a bridge every year to raise awareness for cervical cancer.