http://labs.autodesk.com/utilities/snap/interesting utility from autodesk labs
looks to be a cool upgrade of design center
be careful when adding folders though - i added a folder sized 200mb or more with hundreds of drawings, the connect service (which indexes the drawings has been running at 40% cpu ever since)
if you prefer the index to be located somewhere other than your root drive, you need to edit the exe.config file in the install folder
it indexes everything - blocks, linetypes , layouts
sorry - bummer - only runs on 2010/2011