From iis 7.5 (at least that is when I know it is possible), I can use a dfs share( e.g. \websiteshare\Mysite) as the physical location of an IIS site.
For example, in a web farm environment, we got 2 or 3 servers and the site is a CMS system that maintains some contents and files.
The apparent reason to choose dfs share as the physical location is that when the editor upload a file, it will be available everywhere.
I am wondering if this is a good idea? I always thought dfs is slow and not really good for hosting an IIS site.