Look how old this is! I post at SearchCommander.com now, and this post was published 18 years 5 months 6 days ago. This industry changes FAST, so blindly following the advice here *may not* be a good idea! If you're at all unsure, feel free to hit me up on Twitter and ask.
Microsoft has developed a system to automatically filter spam out of their search engine results pages. The software is called Strider Defender, Microsoft has a webpage explaining what it does and how it works, and more about how MSN Search will utilize it.
At the Search Defender page, there are even 6 different case studies on several spam sites, and good explanations of how they worked their evil, and how Microsoft intends to stop them. This is the entire Microsoft Strider Project page at Microsoft.
