Just keeps getting worse...
Across three personal domains and my Gmail, I'm getting a spam rate of... wait for it... 99.894%. SpamAssassin means that I'm seeing about 3-4 spam messages per day, out of ~100/day that it catches, and a daily total of ~120-130 messages.
Ugh.
Most of the stuff that gets through SA seems to be image spam, and what's annoying is that it's all stuff that a bit of rudimentary image processing will pick up on and eliminate. Maybe that's what my final-year project needs to be -- an anti-image-spam add-on for Procmail.