The supply chain in our industry is done on a just-in-time basis. If you take a large store that would do about 25,000 consumer transactions a week, as product moves out the door that product has to be ordered. Virtually all of the ordering and distribution is done through a telecom data system. It would be hugely impacted, because you have no inventory to fall back on.
On January 31st, 2007. See this statement in context.