I've posted this short summery I wrote on just about every Pinwheel site, Fan page, Facebook group, Twitter, Nickelodeon site, Television blog, etc, I could find. I've also been working with a librarian at the Columbus, Ohio main library (I'll be speaking to him more tomorrow). We've both reached out to OSU College as well since he thinks they may have some records in their history department. I hope it helps.
I've also posted this on the Facebook group for my graduating class from Columbus since all of us grew up with Pinwheel and maybe one of them at least remembers something.
[Edited on 01.23.2012 10:12 PM PST]