Bill Slawski tells us about a Google patent that "discusses how trust rank might be associated with people who apply labels to web pages through annotations." He calls the use of annotations
"interesting," pointing to Google's recent release of Sidewiki, though "there's no sign from Google that Sidewiki and the user trust system in this patent are related," he writes.
Slawski discusses how the idea behind trust rank could influence other projects. "The patent itself goes into some detail on how information from annotations and labels from experts might be used by the search engine to re-order the rankings of search results in response to queries," he writes.