🚀 go-pugleaf

      I called a Moto. sales
    rep. and he said that source was only given to people who purchase
    the binaries for around $700.  The source doesn't include Moto.'s
    modifications, so it seems that it's the same thing available from
    GNU's ftp sites.  

The GPL says that Motorola must offer *complete corresponding* source
to anyone who has the binaries.  They don't have to offer copies
directly to anyone else, but if you have a copy, then the GPL says you
can redistribute it.

    Is the binary copyrightable by Motorola, or does it fall under copyleft?

It is copyrighted by Motorola and it is covered by the GPL.
Everything covered by the GPL is necessarily copyrighted by someone.
For most purposes, it doesn't matter who the copyright holder is,
because the GPL gives so many rights to everyone.

Details like this might seem pedantic, but law is like
programming--the details are important and you can't predict the
results if you ignore any details.

      Can I buy it for $700, then
    give it to all my friends because Moto. cannot legally hold copyright?

You can buy a copy for $700 and then redistribute it, because the
copyright holder is bound by the GPL to permit this.

People at Motorola have given me the impression that they do
distribute the source that fully corresponds to their binaries.  The
only way to make sure is to look at what they actually send.  If
anyone reading this has actually ordered the 56000 binaries and
sources, I'd like to know whether the sources are complete and
correspond to the binaries.