Peter,
In v3 we had the option to upload a zip file and have it be unzipped after it was uploaded. This allowed my clients to upload multiple files at once. Has this been removed (I can't find it).
WebDAV is not an option.
Or, is there a way to provide people with the "import" option on the File menu ? I can see it as an admin, but if I could selectively assign it to groups, this would solve a huge issue.