Who's New and Top Trends.
Who's New includes famous people who joined Twitter in the last year. Check out the feeds for Conan O'Brien, the Dalai Lama, Bill Gates, Tinkerbell, and Victoria Beckham.
Top Trends is broken into categories, with hashtags having a category of their own. Perhaps the average age of Twitter users accounts for the fact that Prince William's engagement and Kate Middleton have risen so quickly onto the top ten lists, since that news just broke a couple of weeks ago.
Twitter is planning three more lists, so check back to find out what they are.