> 4) Do a GET listname (NOLOCK on a regular basis.  Assuming you have
> notify = owner(s),  save the notifications of subscribe and unsubscribe
> between GETs.

If you have 1.8d, this can be done for you by adding Change-log= Yes to the
headers. A file called YOURLIST.CHANGELOG will be saved showing every
activity on the list in summary form.

-aht