The Android 4.0 Ice Cream Sandwich update has started rolling out to Sony Ericsson Xperia active handsets. The SI-numbers have not been updated yet on the official Sony Mobile Talk forums, but Xperia active users are reporting success in updating to ICS.
The Xperia active was the last 2011 Xperia waiting on the ICS update and this news now means that all Xperia handsets from 2011 are now on their way to ICS. The update moves the firmware build to version 4.1.B.0.431. This just leaves the 2012 Xperia handsets waiting on an update to Android 4.0. The Xperia S ICS update is expected within the next few weeks. The Xperia P and Xperia U ICS updates will follow in Q3 2012.