It took a bit of time to get the hang of it but integrating webdav into our web application
in our case we integrated SabreDAv in Yii framework project (Perfony.com) opened a whole set of news opportunities and moreover gives massive distribution potential to our plateform’s data.
SabreDav is a php implementation of most of webdav, caldav, cardav features made by a great man Evert Pot.
So we can proudly say that we can now apply this knowledge to any php implemented project. Feel free to ask for more details.