Spacilus Search Engine Assistant for Google aims to cut down on search engine spam using Bayesian classification. (via Search Science)
Users can improve Google’s results by training Spacilus to recognize spam sites. The more Spacilus learns about your personal search preferences, the better Spacilus can categorize search results.
None of the results are altered – but icons are added next to the listing to differentiate the type of site. Spacilus places sites into three categories:
There is a more detailed description on the Spacilus site.