I remember in the old Synkron.web days there was a module capable of showing files from eg. an internal fileserver in the Synkron.web file library. This was done by having both ftp and iis on the fileserver. The ftp server to serve file listings and moving files around, the iis to serve files for visitors. This means that files weren't syncronized and thus always up to date.
I miss this functionality in DW :-)