I've put together 14 high-quality original podsafe instrumental tunes from my Penmachine Podcast into a CD album you can buy. It also includes a bonus data DVD with a bunch of cool stuff that isn't on this website. Find out more...
It turns out that there is no Bayesian filtering e-mail application for Mac OS 9 and earlier, so I ended up purchasing Spamfire Pro, from Matterform Media.
It does a decent job, getting most spam e-mail out of my way before I have to look at it. There is the occasional false positive (mail labeled as spam that isn't), but that is less common as I add correspondents to the address book. A few spams also slip through, but I can delete those by hand—the problem is reduced to the minor annoyance it was a couple of years ago, rather than the overwhelming flood it had become. The time I save will pay for the $30 US pretty quickly.
The program is far from perfect, but I don't need perfection, just something that shunts aside the spam before I drown in it. Spamfire does that just fine.