While most of the Atrix 4G rumors have surrounded the price of the phone and the notebook-like dock, perhaps you might be interested in the pricing for the HD charging dock (MB860) too, since it offers 3 USB ports that can be used to attach peripherals such as a mouse and keyboard, and also micro HDMI output for 1080p video. Some sites have already put it up for pre-order from $50 to $60, so expect to pay around that price when it finally arrives. Considering that the standard charging-only dock is expected to go for around $50, it would probably be a smarter move to go for the HD dock instead, wouldn’t it?