Mesh networking is an old idea. Oddly enough, the low-cost XO Laptop built by the 'One Laptop Per Child' organization - the so-called $100 laptop - was designed with built-in mesh networking. The idea with the XO machine was that many kids using those laptops would be out in rural areas without reliable Internet access.

With the iPod, iTunes, iPhone, iPad, and iMac, Apple is the most powerful tech company in the world. It's also the No. 1 music retailer in the U.S. and among the top sellers of online movies, too.

The chance to interact with big shots is drawing scads of aspiring entrepreneurs to Quora, along with venture capitalists and other Valley players.

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