The Inquirer is running a story this morning that gives us a very brief preview of ATI's upcoming R580-based mobile GPU. Likely dubbed the Mobility Radeon X1900, it seems safe to assume that this new flagship mobile part will best NVIDIA's current GeForce Go 7800 GTX GPU. Obviously, the frame rates of the available NVIDIA GPU will certainly be faster than the 0fps of the unavailable part. However, the most interesting question within this story is, "What happened to M58?".