There are many useful websites with info pertaining to crop rotation, such as Gardening Know How , for example.
The basic idea behind the layout of the garden is that crops can grow in one area, while the chickens are allowed to dig through the soil in another, while the third section is prepared for the next crop to be planted later in the season.
I designed the main structure using Google SketchUp 6, and I'm still working out the finer details for the chook house/tool shed.
The SketchUp model can be viewed and downloaded from here.
We will be planting our third lot of vegetables soon; so far we have grown pumpkins, tomatoes, cucumbers, zuchinis, carrots, peas, corn, broad beans, snowpeas, parsley, lettuce, spinach and silverbeet; some more successfully than others.
If you want to share notes on your own experiences with crop-rotation, or if this inspires you to start your own garden; let me know, and feel free to share some pics of your own in the comments too.