Mid-2002, Apple release an update to Mail.app that contains a sophisticated, and particularly effective (although with one annoying behaviour) spam-filter. The filter accurately bins 90% of my spam (in the order of a hundred a day), with only incredibly rare false-positives. The Panther version of Mail.app promises to include additional support to integrate with ISPs that run server-side spam-catching tools such as Spam Assassin or Brightmail.
Mid-2003, Bill Gates makes a grand announcement that it's time to deal with spam. Well, soon. When they get around to it. (After all, we haven't got that Trustworthy Computing thing they promised last year yet)
Wow, I'm really quite enjoying being one of those smug Mac users.