Just an update. I am no longer maintaining this plugin. You can find a well written alternative over at Andrew Hutchings site.
Just a quick little ditty to let you know that there is a class/plugin combo ready for Habari that brings Akismet protection to our little corner of the world.
This make use of Alex''s excellent Akimset Library. Thanks Alex!
Let me know if you have any problems. Instructions on how to use the plugin are included in the archive.