Obama campaign staffer Ashley Arenson, who served as director of innovation and integration during the recent presidential election, has joined Soho Tech Labs in the role of general manager. [AllThingsD]

StumbleUpon is laying off 30 percent of its staff in a move to achieve profitability in the first quarter of this year. [TechCrunch]

A British government agency fined Playboy about $160,000 for failing to install adequate controls to prevent minors from accessing pornographic videos. Seems like a slap on the ... wrist. [Ofcom]

Private equity firm Silver Lake Management is said to be close to lining up financing to take Dell private, with a deal possible as early as next week. [Bloomberg]