It's called the Slidemaster 2000 project. More info about this can be found under the link. Furthermore I like to experiment with microcontrollers. If you know any interesting sites I could add to this ever-growing list, please mail me at the address stated below the menu on the left. This way you can make beautiful slide shows.
Commercial solutions cost several hundreds of guilders, our goal is far below that.
We decided to make our design modular, so that for each new projector a module can be added to the system. This script is contained on a eeprom or sram in the main control unit. It also provides a direct control interface, so that shows can be reviewed and edited while the unit is still connected to the computer. We still haven't decided, so let us know which one is your favorite, and why.