Lest "Strider Search Defender" sound too anti-Blogger/BlogSpot (they're the same organization), let's keep in mind that it happens on any blog/wiki site that allows for unmediated commenting, including MSN sites. As an experiment, visit Spaces.MSN.com and type your favorite comment spam topic in the search box (the Spaces search, not the web search).
In short, people who live in glass houses really shouldn't throw rocks. It is a nice project though. More power to the analysts, less power to the marketers!