Jake Mecklenborg's "CINCINNATI-TRANSIT.net" has the most comprehensive section of subway photos publicly available. The are also quite a few other articles on his sie worth checking out. Here is the link;

http://www.cincinnati-transit.net

Yep, he posts a lot at http://www.urbanohio.com (Urban Ohio). You should pop in and share some stuff, there's a lot of people there that are deeply obsessed with all things Cincinnati

He runs an excellent site. Cincinnati Advance held a subway tour and allowed everyone to bring cameras but it seems they dont have any information about future tours, the historical society is doing tours but they say they won't allow cameras.

Just to throw some of you a bone...Ram23 and I checked out the Hopple St. subways tunnels on saturday afternoon, they are wide open, yet somewhat uninteresting since they terminate about 300 ft. down. However, access to them is incredibly easy. The Central Parkway tunnels on the other hand...

There is a large section of pipe sitting outside of the main portals now. They will most likely be opening the tunnel up later this week for repairs of some kind