Tagging might be a decent idea. Then the mailer could pre-sort them. It might also be desirable to have several digests for interests in differing areas. Sort of like the compuserve forums (there is still one for Linux!). This is a VERY active list so some sort of division or pre-sort might be of help. With all the advice and help we exchange on the list (awesome!!), some serialization could lead to some decent "how-to" style documentation :-)