David Karp sold his Tumblr blogging service to Yahoo last week for $1.1 billion. The school dropout had realised as far back as 2000 that video would one day rule gadgets. When David Karp was......
Yahoo Inc said it is acquiring blogging service Tumblr for $1.1 billion cash, a bold bet by Chief Executive Marissa Mayer to revitalise the struggling Internet pioneer by co-opting a Web property......