First you will need to install openvpn and its dependencies.
You will also need to install network-manager-openvpn-gnome.
Failure to do so will result in the following message when trying to add a password or otherwise edit VPN settings:
Error: Failure to load VPN connection editor.I have been using VPNBook OpenVPN: highly recommended.
The only thing to note is that they do change the password every so often, resulting in a failure to connect. New passwords used to be announced on Twitter, but they seem to be on the web page now.