What does the web weigh?

What does the web weigh?  According to a post at the Internet Archive, "the web weighs 26,500 pounds,
the average web page weighs 80 micrograms".  The internet archive is one of my favorite places to figure out how websites evolve.  It’s also a great place to legally download a lot of great music and other audio.

And what does the archive look like?  I guess you can put it on a truck and drive it around.  Click the picture for a tour of the hardware.