Weblog software systems have turned a world of computer literate communicators into self-publishers. A set of phenomena as old as writing itself (personal expression, punditry, diary-keeping, commenting on issues of moment) have gained new energy: the combination of low barriers to entry and the promise of vast distribution have tempted people from teenage diarists to national politicians - via journalists, topical experts and campaigners - into 'publishers'.
Recent estimates put the number of weblogs at between 1.5 and 3 million , excluding simple diaries or home pages. It's also clear that there's a power-law relationship in operation where the top few hundred blogs are attracting very serious levels of traffic. Read the e-consultancy article