Autodesk has released a great new white paper detailing the many benefits and reasons why DWF is the best file format for publishing designs. It was very interesting and makes many great points. It also compares DWF to PDF as far as advantages go. One of the biggest things that I see with DWF yet is that there is no ability to attach a digital signature yet. Once I think DWF has this ability we will see more people migrate to use DWF files. It would also be nice to have the ability to Xref, but not bind a DWF file into a drawing.
The "DWF: The best file format for Published Design information" article can be read at the link on the Cadalyst site.