My full time job now is Senior Anti-Spam Technologist for MessageLabs.
As such I can sometimes be found giving presentations about spam as well as AxKit.
Here you can find my talk for the January 2003
Spam Conference in Cambridge MA, titled:
"Internet Level Spam Detection and SpamAssassin 2.50"
[360K]. I've also made a PDF
version available here [4MB] but
please be kind to my bandwidth due to the size of it.