Best Buy is selling the Atrix 4G Laptop Dock for $100 off and rebate free. The site doesn’t say anything about requiring a tethering plan to purchase the dock. However, there has been report that the firefox browser does not work unless you do have the plan. None the less, if you want to enable hotspot and tethering for free.99, I suggest you check out the Atrix 4G section on XDA or speak with your best friend Google Search.
The Atrix Laptop Dock allows you to dock your phone and use a full featured browser with a keyboard and touchpad mouse. Check out the commercial below.
Via Best Buy