Six Apart is launching a new free open source product into beta called TypePad AntiSpam. While the product is new, the technology behind it has been used by Six Apart since May 2007 on millions of hosted TypePad blogs.

What’s TypePad AntiSpam?

• A free, open source system powered by TypePad for blocking comment spam on any site, free no matter how many comments you get.
• A service for all bloggers, built into TypePad blogs already and implemented as a free plugin for users of platforms like Movable Type and WordPress.
• An open source engine which developers can use to create new antispam services, with customizable rules and logic.
• In beta! We’re hearing great results from testers so far, but wanted to open up TypePad AntiSpam to a larger audience so we can make sure the system is getting as smart as possible.

Like Akismet, TypePad AntiSpam takes a multi-headed heuristic approach to detecting and blocking comment spam on blogs. If you are a blogger, you’ll want to use Akismet or TypePad AntiSpam.

source: www.sixapart.com/blog/2008/05/typepad-antispam-whats-good-fo.html