PFDAVAdmin was one of my favorite tools for troubleshooting public folder related issues. A great tool that helped in almost every type of PF related issues.
MS Exchange Team announced the a new tool as a replacement of this and called it ExFolders. ExFolders is just a port of PFDAVAdmin, says Bill Long on Exchange Team blog. The tool is available for download from http://msexchangeteam.com/files/12/attachments/entry453398.aspx
Preserving the old interface of PFDAVAdmin they have added few more features into the new tool and some changes in the way the tool should be used. You can learn more about ExFolders Here