How can you talk face to face on Facebook?

Previously you could only use chat. This has, however changed.
In the chat window of the person you wish to talk to, there should be a video camera icon, that when hovered over, says "Start a video call with [Name]". You will need a plugin first, and once the FaceBook video chat plugin is installed, you may video chat with others who have the plugin also. FaceBook will prompt you to install the official plugin when you click on the video call button.