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The buttons have some flair and design as you slide your finger across the top of the keyboard.
The Tablet version of the Lenovo X61 is a bit larger, but is still quite portable and a compelling device.
There are a few modules available at launch, such as a display, digital camera, GPS, and accelerometer. There are 81 modules under consideration and with the fully hackable nature of the hardware more modules will probably be coming from the public.