I previously posted a link about why twitter is useful (and fun!), but I recently heard an interview on NPR with one of the founders of twitter. This was one of the most succinct explanations of why twitter is more than just a "micro-blogging" tool.
After you've listened to the twitter piece, check out this one on getting and getting rid of earworms (the musical kind).
After you've listened to the twitter piece, check out this one on getting and getting rid of earworms (the musical kind).