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* Is Groupon running out of money? Henry Blodget over at Business Insider does the math and concludes -- among other things -- that as of June 30, the leading daily deal site owed $392 million to merchants for sold Groupons, significantly more than the $225 million of cash the company had on hand. (Business Insider)
* Andy Miller, Apple's (AAPL) head of mobile advertising, is leaving the company to join venture capital firm Highland Capital Partners. Meanwhile, Louie Manta, a visual interface designer on the iTunes Design team, is leaving for credit startup Square. (Fortune and 9 to 5 Mac)
* Facebook co-founder Chris Hughes sold his activism-focused social network Jumo to GOOD, a digital media platform, for what basically amounts to $0. (BetaBeat)
* Actor-turned-angel investor Ashton Kutcher guest-edited a large chunk of Details magazine's social-focused September issue. Check out some of the results, including a round-up of entrepreneurs dubbed, "The New Titans of Tech." (Details)
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A curated selection of the day's most newsworthy tech stories from all over the Web. Sign up to get the newsletter delivered to you everyday.
Daily deals site LivingSocial, which has made a splash over the last few months with half-off deals from Amazon and Fandango, just clinched $400 million in funding from existing investors like Lightspeed Venture Partners and Amazon, at a valuation of $3 billion. (Wall Street Journal)
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