If anyone hasn't seen the 'Twitter Tracker' segments on the Tonight Show with Conan O'Brien, you're missing out. They've included this segment in two episodes of the show since Conan started on June 1, and they're hilarious. Basically, some voice-over guy reads some celebrity tweets that are completely useless (such as Ashton Kutcher's tweet about going to the store). The skits have been hilarious both times, and make fun of Twitter and its ridiculous popularity that it has seen over the past few months.
Here's the second of the Twitter Tracker segments for your viewing enjoyment: