Via a blog that I ought to perhaps add to my RSS feed, Read/WriteWeb, comes this article, “Wikirage: The Wikipedia Zeitgeist.” To quote about Wikirage:
Wikirage is a zeitgeist based on the number of edits to Wikipedia articles. Wikirage shows the top 100 most edited articles over the past hour, 6 hours, day, 3 days, week, and month. For each topic in the top 100, the site also has a historical graph of edits for the past 4 weeks, as well as its relative ranking over time.
Obviously useful for teaching about wiki stuff for sure.