First, a caveat. We tried to approach this design problem pragmatically, being as realistic as we could about the design decisions we made — as realistic as one can be with only a superficial understanding of the constraints, of course. Any truly serious redesign of Craigslist would inherently look very different from what we produced, and we kept that in mind from the very beginning. And, yes we took some artistic license, too, which is why it’s probably more accurate to call this a re-imagining than a redesign.
Because we only went as far as rendering our ideas in these static comps, a lot of the functionality we had in mind could only be implied in the interfaces, and not demonstrated. So I put together a Keynote deck to walk Scott and his editors through the ins and outs of our concepts. Here they are, in smallish but I hope readable form.