how to get a FREE IPAD 2!! http://droidmodderx.com/how-to-get-an-ipad-2-for-free/
Download the APK here : http://droidmodderx.com/gingerbreak-apk-root-your-gingerbread-device/
This is the first one click apk to root your android device visit http://rootzwiki.com/wiki/index.php/Gingerbreak for complete list of devices it is compatible with
so far it does not work on the atrix, but visit the link above as this apk will be updated to support more and more devices, if you device is not shown in the wiki as being supported still try it, ive seen many devices confirmed working that are not listed in the wiki, also this may be backwards compatible, and may be able to root froyo and honeycomb?