Here is another tutorial video. It shows how easy it is to get the Photon socket-server SDK for Unity 3D running. Just download it from our website, unzip the files, edit the Unity Scene file (to change the server to your local IP) and it runs. And all it takes is just about 2 minutes. You do need to have the Photon Server installed locally, of course. How to do this, our How to Install Photon video will show you – in even less time.
Edit 2012-10-11: Please see http://doc.exitgames.com/photon-server/PhotonIn5Min for an updated video and instructions.