This whole related-tags thing has been around for a month, but Dave Sifry says it’s official. I went and tried a half-dozen and the results were all over the map. I think I spot a pattern where things that are more or less steady-state are lame (Vancouver, prostitution), while it works well on current events: (Firefox, DeLay, Gomery). Which is intuitively plausible. But my question from last month still stands: Are tags useful? Are there any questions you want to ask, or jobs you want to do, where tags are part of the solution, and clearly work better than old-fashioned search? I really want to believe that tagging is big, a game-changer, but the longer I go on asking this question and not getting an answer, the more nervous I get.