WebDAV Form-based Upload


I have a WebDAV dropbox on my site and I would like to give a few people the ability to easily upload files to it. Does anyone know of a nice method for inserting a file upload field into a page that will then be able to upload to a WebDAV directory?

I would prefer that it also authenticates the user, just as when I connect natively via XP, or OSX. From what I’ve read it seems HTTP PUT might accomplish what I want, but I am unable to find any decent information about how to use it. I also found the commercial “Thin Putter” but it requires editing web server files that I naturally don’t have access to.