I think I can hear the engineers over at the Long Now foundation pissing their pants with laughter: http://longnow.org/clock/
They are only aiming for 10,000 years. A walk in the park compared to this apparently godlike and immutable mp3 player atop a painted plywood box. Has this guy even heard of atomic diffusion? Not like it'll last long enough for that to even come close to becoming a relevant factor.
Where do people get this idea that machines are eternal? It's outrageously rare to find a machine more complex than an adjustable wrench that lasts half a lifetime, let alone surpasses generations, but in nearly all of fiction machines are portrayed as ageless things that dwarf our puny lifespans as fragile meat-beings. It's simply not true.
This is a weird tangent, sorry for derailing.