Google has announced via Twitter that it will be rolling out Android 4.0 Ice Cream Sandwich to the Nexus S starting today. The GSM models of the device will be the first to receive the update, which will roll out in batches. The Nexus S was Google's premiere Android 2.3 Gingerbread device that launched last November.
The update will be issued over-the-air and proceed to roll out to devices in waves over the next month. This means that some users of the Nexus S GSM version could be getting the update as early as today, while others may have a month to wait. Nexus S 4G users on the WiMAX network will have to be more patient.
And if you're waiting for the update, you might as well check out Google's tips for Android 2.3 Nexus S users upgrading to Android 4.0. Some functions and features such as changing wallpaper, adding a widget to the Home screen, and scrolling through apps are slightly different on the new interface.