<p>When I do a cvs status, I see working revision and repository revision numbers.
What is the difference between the two, or rather, what do they mean?</p>

the
working revision
is just the revision you are currently using. the
repository revision
is the revision currently in the repository.
basically, if the
repository revision
is larger than your
working revision
, someone has committed changes to that file, and perhaps you should update your version, or you may end up with a conflict if you try to commit your own changes at a later time.