Hi John,
I would take some time and research the properties at your recorders office. For those properties that are in some sort of foreclosure, the recorders office will have the name of the trustee, whom you can contact directly. Without the owners permission, I don't think they can share any personal information with you, but things that are on public record they could probably talk about. You may have to find the owner (if the _title_ is still in their name) to negotiate a short sale, so sharpen your detective skills.
I don't know a lot about bankruptcy, but I believe that bankruptcies are also recorded at the recorders office. Once a person files for bankruptcy protection, I believe that everything is frozen. That means that the bank can't foreclose, but the owner can't sell the property either, without approval from the bankruptcy court. You might want to check into the bankruptcy laws, or with a qualified licensed expert -- something I am not.
You will be able to find a lot of the answers at your county's recorder's office. You may have to cross-reference some information between the assessor's office and the treasurer's office as well. Check
www.netronline.com to see if your public records are online.
Good luck!