The Microsoft Store have Dell's new convertible tablet on sale right now for $150 off retail. Curiously enough, Dell are still selling it for $550.
The Duo is based on a 10" touchscreen, and it's running Windows 7 on a dual core 1.5GHz Atom CPU with 2GB Ram, a 1.3MP camera, SD card slot, Wifi, Bluetooth, ethernet. It weighs around 3.5 pounds.
I was excited by the design when I first saw the Duo but I lost interest when it hit the market. $550 is far too much based on the hardware specs. Even $400 is too much; you can find a much better laptop for that price.
But the battery life is the real killer. According to Engadget, the battery on the Duo only gets around 2.5 hours (and you can't swap the battery). In this price range it should really have at least twice that.