If you design software, you may want this iPad sketch tablet from PixelPads:
At the heart of PixelPads is the 10-pixel grid which allows you to sketch detailed, pixel-perfect interfaces; yet it’s also light and unobtrusive enough that free-spirit designers and developers can freely color outside the lines for more organic interfaces.
On the back of each sheet you’ll find the 4-screen storyboard format, perfect for designing and developing horizontal and vertical sequences.
Worth looking into.
(Via Cameron Moll.)