Implementing True WebDAV Homedirs?

Vito asks: "I'd like to use WebDAV over SSL (with [preferably digest] authentication against Unix accounts) to provide a few hundred Windows users with secure, easy, and free access to their Linux home directories. WebDAV is supported as Web Folders in Windows, meaning there is no need to download and install SFTP, SCP, FTPS, and other clients. It's also supported natively in Mac OS X, and Linux users can install davfs. But this setup doesn't seem to be possible (safely) using Apache. Do I have alternatives?"

"Apache has mod_dav, which seems to be primarily designed to provide a single shared space to files, where the Apache process user has read/write access. mod_auth_digest doesn't seem to be usable at the same time as mod_auth_shadow. It would appear that the only way to 'properly' do what I want to do would be to run Apache as root(!), have vhosts for every user (webdav.username.domain.com), have Apache change to that user's uid and gid before enabling webdav for their home directory, and then use basic authentication instead of digest authentication.

Is anyone out there trying this? Has Anyone used Jigsaw, kirra-httpd or even the no-longer-available MoulDAVia in a production environment? What are you using to provide non-trivial, safe WebDAV services?

I know I can use something like a restricted SCP- and SFTP-only shell, like scponly and rssh, but again, I'd prefer WebDAV as it wouldn't require the end user to install a client application."