webdav is a little bash script that binds the T-Online WebDav folder into your system and opens it in konqueror or closes connection.
Also positive tested with GMX WebDav.

Just put username and password into the script (described inside) and set the folder where to mount. A short description (in german) is included.

It requires wdfs. The wdfs installation for Kubuntu is described here (german): http://blog.jl42.de/index.php?/archives/304-Tomboy-Notizen-auf-eine-WebDAV-Freigabe-unter-Ubuntu-Gutsy-syncronisieren.html

Tested with openSuse 11.0 and Kubuntu 8.04.