So as far as the packaging goes, it seems as though there are two directions shaking out of this discussion:
Minimum impact (but disposeable)
re-useable (but you have to store it, which is a pain in the butt)
Both of these directions assume something that is not necessarily true: That the packaging can only be THAT packaging.
I'm not proposing that the Audiophile should save his $3000 speaker box by making it into a super-ghetto coffee table, or that the epoxy foam guy needs to make a cute little epoxy foam ash tray for his grandma (yuck)
Instead, what if there were a material (of course, not quite invented yet, but maybe possible) that was reasonably particulate and homogeneous. And, this stuff stuck to itself, and could be caused to "flow", or pack, or build around an object you wanted to ship. And then, this stuff could be caused to "stiffen" with the application of electricity, or magnetism, or heat, or whatever.
So now, rather than everyone saving all these boxes which are non-standard (because who's going to ship a pair of earrings in the box from those speakers?), everyone can just "melt" or break apart, or dissasemble this packaging each time the get something in the mail. And now, everyone can keep a fairly small bucket (as opposed to a giant load of boxes) of "packaging stuff" in a closet for when they have to ship out christmas gifts.