Here’s the latest action:

Chegg buys CourserankOnline textbook rental service has acquired Courserank, a startup that helps college students build and share their class schedules.

GM’s green IPOEarth2Tech published a comprehensive list of 12 items in its IPO filing that relate to its green strategy, including the Chevrolet Volt, biofuels, OnStar and more.

EpicWin turns your to-do list into an RPGGame developer Rexbox has released a new productivity application called EpicWin that turns crossing items off your to-do list into a role-playing game complete with level-ups, rewards and more.

NYC startups after the 212 — Burgeoning tech companies in New York are looking to the traditional 212 area code as a status symbol, taking measures to snag such a number over a lowly 917 or 646.

iOS being tested for mystery deviceAppleInsider reports that Apple is testing iOS 4.1 on its next generation iPod Touches and iPads, along with an unnamed connected device that could eventually be a big news story.

Apple rabble-rouser lashes out at competition
— Phillip Shoemaker, director of Apple’s App Store, who sparked controversy already this week, is now using Twitter to rain insults on the company’s rivals, according to ValleyWag.

Groupon rakes in $4M in one day — Thanks to a compelling offer ponied up by the Gap, social coupon site GroupOn was able to bring in $4 million in revenue in just one day today.

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