Defensio launched their public beta today. I've been part of the private beta for a couple months now, after openly criticizing Akismet. Defensio is a similar tool, so it does fall prey to the same "wisdom of crowds" weaknesses. Defensio's usability far outstrips SK21 and Akismet2, and the launch of the website improves it a bit. Now there's an RSS feed for my spam. Granted, that's a little strange, but it's better than SK2's digest emails, which untrain google's filters by passing along spam content inside legitimate emails. I like having a choice in anti-spam measures, and especially one that's upfront about its accuracy, and that's cognizant of the need to police your own quarantine. Here's a couple screenshots to give you an idea of what it looks like:

1. gouge my eyes out ugly
2. requires plugins upon plugins to be usable