Small (another word for naive in this case, it's simple and serves my needs) [Rack](http://rack.github.com/) application providing the information an [OpenVPN](http://openvpn.net/index.php/open-source.html) server collects in it's status file especially including a list of currently connected clients (common name, remote address, traffic, ...).
For more information about OpenVPN status file and version, see their [man page](https://community.openvpn.net/openvpn/wiki/Openvpn23ManPage). openvpn-status-web is able to parse all versions from 1 to 3.
The [Debian 6 init.d script](init.d/debian-6-openvpn-status-web) assumes that openvpn-status-web is installed into the system ruby (no RVM support) and the config.yaml is at /opt/openvpn-status-web/config.yaml. Modify to your needs.