We're used to measuring hot topics thanks to our world-famous Buzz Log (yeah, we're biased). But there are plenty of ways to play the Web popularity game. This fascinating site is one of the more interesting ideas we've run across. Using publicly available data from Wikipedia, Craig Wood tracks which entries in the open encyclopedia are undergoing the most frequent edits. A unique insight into subjects with sizzle, Craig's cool tool lets you slice the data over a variety of time frames. We recommend raging along with this hot hack every day.