The GripBase is an accompanying product that mounts onto the same case and functions and an upright stand for the iPad. The GripBase turns a full 360-degrees on the table, and also rotates the iPad for portrait or landscape.
The removable accessories gives the case a modular design and allows users to perhaps leave the GripBase at home/office and the GripStand piece on the go. The modular design allows too perhaps a future iPad 2 version so you could just pick up the case and keep using the other accessories. Also, the tab removal has a real nice solid feel to it.
The GripStand and GripBase are available in Black and White models. Each are available for list price of $29.99, or for $39.99 when purchased together.