An update has just been pushed through OTA (Over the Air) for Bell Motorola Atrix 4G owners. This is software version v37.23 and to download this go to Menu > Settings > About Phone > Software Update. This update brings data speed improvements, call quality improvements (including Skype) and will also apparently reduce the amount of times your display freezes. Full details of the change log are below.
Upload Data Speed:
Increased upload speed at which data can travel on the network.
Data and Voice Connection:
Improvements to prevent interruptions to data and voice connection.
Improvements to prevent screen from freezing.
Improvements to call audio function so it is easier for the person you called to hear you. Please note this application is not pre-loaded on phone, but is available for download from Android Market.
Increased functionality by enabling Yahoo Email to be sent over a Wi-Fi connection.
Improved International Roaming Warning Message by simplifying user notification so that it only appears on the screen when you move to a new network.
Improved Happenings Widget to ensure that you receive the latest updates across the social networks you are connected to such as Facebook, MySpace, Twitter.
Improvements were made to incoming and outgoing call functionality to ensure a more seamless experience
Expanded Language Support for Webtop:
Accented character support within Webtop application.
Improved Support for POP/SMTP Email:
Support for SMTP outgoing servers that do not require authentication
Improved Exchange Performance:
Improved Exchange Email/Calendar/Contacts performance
More here at Motorola Forum
(Thanks to Kevin, Rick & Steve!)