Whether it's just a fad or a new mainstay in social media, Twitter is probably one of the more polarizing services on the Internet. For some, it's an everyday must-check. For others, it's a joke, and its consistent users something to ridicule. For the uninitiated, Twitter is a social networking service that allows you to send 140 character-or-less "tweets," and subscribe to and follow the tweets of others. At its basic level, it's a tool for feeding people a lot...