About everything and nothing

Tumblr, the combination blogging platform and social network, has been growing rapidly of late — so rapidly that it is now racking up about 8.4 billion pageviews a month, according to a blog post from president John Maloney. One of the big drivers for this growth appears to be teenagers, who are using the site as a kind of combination of Facebook and Twitter, to share photos and other Internet “memes.” But will Tumblr ever figure out how to make money from this massive user base? Other social networks have grown just as large and still failed.