WebDAV for Apache - mod_dav goes gold
mod_dav has been released, providing an Apache-based implementation of WebDAV, a set of tools for remotely editing and managing files on Web servers.
WebDAV, which stands for Web-based Distributed Authoring and Versioning, is defined in RFC 2518. An number of additional specifications providing extra functionality are in development at the Internet Engineering Task Force (IETF).
WebDAV is a set of extensions to the HTTP protocol, not a complete application, but it makes it possible for WebDAV-enabled clients to send, modify, and manage files on WebDAV-enabled servers (like those running mod_dav). Some of the functionality duplicates that available in older protocols like FTP, but WebDAV provides both better support for collaboration and a more customizable view of the Web server.
Information on other projects supporting WebDAV is available.