Marlow, first off I work with Fab-Form.
Keep in mind that you will only use 2x4's to form any footing. And the fabric will stay in place to prevent moisture from wicking up into the footing. It seems silly that we spend all this money waterproofing our walls, just to let all the moisture be absorbed through an unprotected footing.
Here is a link to what we like to see on any job regarding footing damp-proofing.
Through the same process we are also preventing any chemicals from the concrete leaching into the ground water table as well.