Review: Motorola Atrix 4G
The Atrix 4G runs Android 2.2 with Motorola's Motoblur user interface plastered on top. As far as I can tell, Motorblur hasn't chanced since summer 2010. (Phones debuting later this year will have a new version.)
The Atrix 4G has seven home screens, each of which has been crammed with content by Motorola and AT&T. All of the content can be customized at will and moved, deleted, rearranged, etc. One thing I still don't like are the little indicators at the bottom of the screen that tell you which screen you're on. On most other Android handsets, these indicators are small and unobtrusive. On the Atrix 4G, they are huge, animated, and get in the way of accessing the app drawer.
The best feature of Motoblur remains to be the resizable widgets. These really expand the possibilities for customizing the home screen.
The rest of the menu system appears to be unmolested Android 2.2. All the same options, menus, and themes are present.
One thing to note, the Atrix 4G stuttered from time to time, and froze severely enough several times to require a battery pull.