Maybe it would be nice to show some interesting stuff of the system itself?
This way, the screensaver is not only a screensaver, but also a usefull tool...
I'm thinking of
- Images of the surveillance camera's
- Floorplans of the house with status of outputs (lights, power outlets...)
- Floorplans of the house with security sensors
- Health of the server (disk, cpu, mem...)
- Other images (fe Weathermaps of cacti)