someone requested an app like this recently; there are others apps to do this but just noticed this new one on snapfiles.com:http://www.workshare.com/products/trace/
TRACE! is a free document security tool that provides personal protection against information privacy and compliance violations in all documents you touch. Run TRACE! against any Microsoft Office document on your computer, company network, or on internal or external websites.
TRACE! analyzes Microsoft Office documents and provides an “Always-On” document security risk rating to alert you to the presence of potentially costly violations of regulations as well as inside-out breaches of information security.
Dynamic tracking of nearly 100 content security, privacy and compliance violations
Always-on alerts with risk level warnings on problems in new and existing documents
On demand or batch assessment of documents in folders, email and on websites
Automatically updates as legislation and regulations change.