Bearded music guru Rick Rubin has joined the board of MOG, the social-networking site with a music-blogging component, an easy-to-remember three-letter name, and $6 million in capital, including money from Sony and Universal Music Group. According to MOG founder David Hyman, the site will soon be classifying its blogs by genre and launching an ad network for independent music blogs. Also, Rubin apparently has some user-experience gurudom lurking beneath that thick beard of his. (Given that Rubin seems to think that subscriptions are the future for saving the music business, though, I suspect that there’s at least a little bit of executive puffery lurking beneath that statement.) Hyman also claims that the site has two million users, although I wonder how many of those accounts have long been dormant. [LA Times / Photo: AP]