iPhone ring notification on the computer
As far as I know, there's no way to do that directly with a non-jailbroken iPhone.  (I would love to be wrong about that, though.)

You might be able to set up your phone with a third-party service to get functionality like this.  For example, using Google Voice with an app like GrowlVoice ($5).  GrowlVoice can provide real-time SMS notifications, but I'm not sure about real-time call notifications.