Yesterday, and todya, Paul Hartzog and I architected the basic building blocks of Local Food Systems network architecture.
The idea here is to be able to make very flexible and useful architecture, that can be easily added to over time, and that can be used both on localfoodsystems.org *and* elsewhere.
The system accepts multiple inputs, processes in many useful ways, and generates multiple outputs. The system is made entirely of open source software.
Here's a graphical represention of the architecture: