From humble origins as a nerdy pastime of computer geeks, Twitter has recently become an international phenomenon of online social networking. More than one million Tweeters update their microblogs on a daily basis, including such famous figures as Barack Obama, Martha Stewart, Shaquille O'Neal, and John Cleese. This accessible and humorous introduction to the expansive world of Twittering offers advice and insights on how to get started Tweeting. Common codes and abbreviations are deciphered, and a selection of the weirdest and wittiest Twitter feeds is also provided along with a list of the best celebrity Tweeters. Entertaining and educational, this is a delightfully irreverent look at today's hottest online craze.