Streamlining logistics is a good way to reduce cost, but it also cuts risk by reducing reliance on fuel (with its volatile and rising prices). And if the more extreme peak oil theorists are right, costs could be heading way up over the next decade (think $200/barrel, a number that seemed outright absurd a few years ago). So it's a good idea to start reducing distribution costs now.  Here's how some smart companies are leading the way - by packing trucks more efficiently, redesigning delivery routes, reducing truck idling and, yes, switching to new vehicles entirely. By Andrew Winston