"Twitter's overnight Internet fame stems from one simple question: 'What are you doing?' You have 140 characters of text to answer, and as soon as you hit Update, the site's millions of users can see what you're up to. This small idea has blossomed into a hugely popular phenomenon, with its users covering the entire Earth, developers creating scores of helper apps for it, and a raft of imitation sites. This is the 'social-networking and microblogging' site where you can read fascinating and mundane quick takes such as 'ate a piece of cherry pie' or 'just had a great workout.' But despite the service's seemingly trivial function, which causes many to snub it and can at times make it akin to listening to other peoples' cell-phone conversations, Twitter fills a gap left by other forms of communication."

Get the Word Out - Fast! - Twitter - At A Glance - Reviews by PC Magazine