CALLING all Web-savvy Shakespeares! Mini-blog services like Twitter are producing a new literary genre, say the authors of a forthcoming style guide on the "short form". Twitter, which has several Chinese versions, is an online application that encourages people to post comments of up to 140 characters about what they're doing or thinking. "This is a new writing genre, a new form of literature, in some ways," Dom Sagolla, one of the authors of 140 Characters: A Style Guide for the Short Form, told The New York Times. In the book, Sagolla and co-author Adam Jackson advise aspiring Twitterers on everything from abbreviations to finding a niche, to holding their "followers'" attention. "Don't be boring," they say. "Everyone starts the day off with coffee. Don't ‘tweet' that you're having coffee." If you want to write about your morning coffee, add a personal touch: "Starting a long day with a cup of joe [coffee]. Two [packs of] sugar and a bit of cream. Mmmmm". For more info on this emerging, um, art form, check out the authors' Website, 140characters.com.