Groups of commits

Hi all,

  In my work place, we have a lot of strict rules to get something
committed.  The code has to pass against a large test suite, it has to
be tested on different hardware, and so on.

  The problem is that it forces everyone to have one single large
commit for a week's work.  All the intermediate stages get squashed
and that history forever lost.

  It would be nice to have a commit in the repository, treated as a
single commit for all purposes, but then be able to split it into
multiple commits if necessary.

  Any ideas?

John