John...
Corey,
How has this been working?
John
Well it hasn't blown up on me. I did a quick grep through my junkmail folder and it scored a hit on about 5% of the emails there. Of course that doesn't mean spamassassin wouldn't have caught many of those without FuzzyOCR. It seems to have helped the epidemic though it hasn't cured the problem as a number of image-based spams are still getting through.
Keep in mind though that I'm just using this on my own personal server so the email volumes aren't very high. I imagine FuzzyOCR would add considerable load to a busy site.
I also have some issues with the current design of FuzzyOCR. It relies on a fixed list of keywords. It's too bad it doesn't/can't(?) leverage the existing bayesian-based scoring built into spamassassin so it could be more adaptive.
Anyhow, it's not a silver bullet but if you're running a low volume site or have a server with lots of headroom it may be worth installing... At least until a better solution appears.
Corey