Is Marissa Mayer a fan of Dogshaming? Rumors are swirling that Yahoo is set to acquire Tumblr, favorite blogging site of short-form jokers and Bieber fans everywhere. The deal is reportedly worth up to $1 billion. The tech firm is holding a press conference in New York City, Tumblr's hometown, on Monday. Invitations to the press conference asked attendees to “join us as we share something special.” We're having a hard time thinking of something more special than Tumblr.