Have you checked out the Content Explorer in AutoCAD and AutoCAD Architecture (ACA). It is pretty cool. It can be accessed from the Plug-ins Tab in AutoCAD or the Add-ins tab in ACA, both look like binoculars.
With Content Explorer you can catalog content for speedy access, index the objects in each file, and search for content in local drives, network locations, and the Autodesk Seek.
Click on the side image for a better look.