Originally announced at the end of July, Thought Out has finally begun shipping Stabile Pro Stand for iPad ($85), a follow up to its original Stabile Stand. Still a big hunk of metal -- four pounds of steel -- this stand incorporates one very different feature from the first model. Instead of a fixed position, the holder is on a ball pivot with 80º motion left to right, forward and back. Because the tablet simply rests on the holder, it can be used…