JTB Sheet Set Publish is an app for Autodesk® AutoCAD® that publishes sheets in Sheet Sets to files like PDF and DWF. The files created are named as you want based on a naming formula that you specify. Use date fields and/or sheet properties of your choice to build up the output filename.
A trial of this product is available at JTB Sheet Set Publish Trial.
More details can be found at http://jtbworld.com/jtb-sheet-set-publish.