Based on the WPF Custom Screen Saver Art artikel by Erik Klimczak on coding4fun, a colleague of mine, Michiel van Oudheusden decided to extend this screen saver to show real presence.
Showing presence icons and the friendly name of the user. Next to this presence there is a kind of notification for incoming messages. The icon is going to blink.
The presence information is build with Microsoft Office Communicator 2007 SDK.
You can download the source code of this C# sample project code from codeplex.
More information here.
For running this sample you have to need Office Communicator 2007 installed. This code doesn't run on 64 bit machines.
There is one strange thing I encountered. The presence only changes if there is an other product running that is integrating with communicator (Outlook).