This post was originally produced for Forbes. You can download an audio podcast here or subscribe via iTunes or Google Play. When anyone seeks to reinvent the grocery business in light of both the wreckage left by WebVan and the presence of Amazon with Whole Foods in the market, it is hard to conceive success for a well-capitalized upstart. When the entrepreneur is a 24-year-old college dropout, the temptation to dismiss him grows. Chai Mishra is launching a consumer-owned cooperative to provide online groceries with confidence bordering on hubris, but backers including Y Combinator and the San Francisco 49ers are betting on his new platform, simply called