Even though we reported yesterday that the Motorola Atrix would be receiving the option to unlock its bootloader, a group of dedicated developers on XDA have found a way to do, even on Froyo. The update involves flashing a specifically-coded SBF, and then running commands from the fastboot menu of the phone. If all goes well, you'll get the fabled "device is now unlocked" message, and you will be one step closer to killing that damned Motoblur.

XDA user XLR88 reports his success

However, there are some limitations. The phone has to either be running the AT&T or OLYFR version of the phone; certain versions, like the French or Bell Canada Atrix have been reported to have less than optimal results (an error which stops the process, but no reports of bricking).

Users wanting to give it a try can follow the directions provided by BriefMobile below! As usual, Android Police will not be held responsible for the bricking of your phone in case something goes wrong.

You will lose your /data partition in this operation, so back it up! You will lose your /data partition in this operation, so back it up!

Source: Briefmobile, XDA