Word/DAV for Confluence
Word/DAV is the easiest way to increase wiki adoption in your organization. It provides a seamless interface between your wiki and the familiar idea of document sharing. It allows users to use Microsoft Office or OpenOffice to edit wiki pages as well as making it possible to create wiki mashups from existing Office documents.

Watch the demo or read about the major features.
For more in-depth information see the Word/DAV documentation or download Word/DAV and give it a try.
