Magazine world view: Digital bellyband; Variety goes cheap; kiddie bomb; digital imperative

• [British prime minister] David Cameron 'open' to press regulation, say campaigners (Guardian)
• Popular Science creates digital bellyband for its tablet edition (Folio:)
• Take the money and run, former head of largest U.S. postal labour union, tells workers (Dead Tree Edition)
• Quark's app studio now supported by HTML5 (Folio:)
• Variety magazine sold for $25 million (Guardian)
• Advertisers, content, audience all up, says MPA (Folio:)
• Tunisian children's magazine faces prosecution over petrol bomb article (Guardian)
• Digital first isn't an option for media -- it's the only way forward (Matthew Ingram -- paidContent)