I am a fan of the whole framework-res from Xperia Arc so I decided to make it a theme for the Atrix! I've put it together in a script this time for easy installation.
Boot into CWM
Disclaimer: I am not responsible for any softbricking that may happen to your device. I have only tested it on my phone only.
synergye for the white text mod and no "AT&T" from services.jar on his Gingerbread theme
kennethpenn donate - black menu and Gingerblur framework
benem3000 for 1.57 edit