It took just 28 days for Apple to sell 1 million iPads, and users have already downloaded 12 million apps and 1.5 million books from Apple’s online iBookstore. Still, one of the most anticipated accessories for the device—the keyboard/stand/protective cover called the ClamCase—won’t hit stores until the fall.

The case attaches to an iPad using a 360-degree torque hinge that allows it to open and close like a book. It can also be used horizontally to prop the iPad up like a digital photo frame or small-screen TV and, when closed, the ClamCase protects the iPad’s 9.7-inch display.

The case also turns the iPad into a laptop-like device, thanks to a Bluetooth-enabled keyboard. And the keyboard isn’t just iPad friendly: It can be used with other Bluetooth-compatible devices, including Playstation3 and TiVo. The accessory is expected to cost between $99 and $129.

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Running on Green

As Americans are reminded of yet another consequence of the country’s dependence on oil, a large and influential group of consumers and national energy experts will meet in Las Vegas to decide the future of fuel consumption. The era of oil is ending, says Annalloyd Thomason, director for the Alternative Fuel Vehicle Institute, an entrepreneurial organization for alternative fuels and vehicles.