Hashtags are to the social web what emoticons were to Web 1.0 and TXTing. While both are forms of expression and sentiment, there is one subtle, but vital difference. Hashtags are not only part of online culture, they are defining a new era of communication on the Web and IRL (in real life). With over 140 million Tweets flying across Twitter every day, hashtags surface a method to the madness – the ability to group conversations into an organized timeline….