Lenovo has debuted an ARM-based smartbook powered by Qualcomm’s 1GHz Snapdragon chipset platform.

The Skylight – which combines the best of smartphones and netbooks – features all day battery life (10 hours), WiFi/3G connectivity and a custom interface with live web gadgets.

The device also boasts a 10.1 inch screen, 20 GB of standard flash and 2 GB of cloud storage.

“The web has become the window to the world for more and more people, helping them connect with friends and family across town or thousands of miles away,” explained Lenovo spokesperson Peter Gaucher.

“Skylight combines the long battery life and connectivity of a smartphone with the full web browsing and multimedia experience of a netbook to create one of the first devices in this developing smartbook category.”

Indeed, Skylight offers users 18 preloaded web gadgets, including Amazon MP3 and Roxio CinemaNow.

“Users can check Google Gmail, update their Facebook status, see what’s new on YouTube or browse the Internet – without having to continually refresh or log in. Skylight delivers the performance needed for mobile users unwilling to compromise their mobile experience and the flexibility to store their data wherever they like – in the cloud or on the device,” added Gaucher.

The Skylight smartbook will be available beginning in April 2010 at a $500 price point.

In addition, AT&T is expected to offer two-year DataConnect service plans, as well as Data Connect Pass – a pay-as-you-need it data service available by the day, week or month.