http://blogs.sonymobile.com/products/2012/03/30/the-vans-around-the-corner-android-4-0-ice-cream-sandwich-software-upgrade-coming-to-2011-xperia-smartphones-starting-from-mid-april/?utm_source=rss&utm_medium=rss&utm_campaign=the-vans-around-the-corner-android-4-0-ice-cream-sandwich-software-upgrade-coming-to-2011-xperia-smartphones-starting-from-mid-april said:
[...]
The first Xperia models to receive the upgrade will be Xperia arc S, Xperia neo V and Xperia ray. For these first models, the rollout will start mid-April and continue over 4-6 weeks.*
Following on, Xperia arc, Xperia PLAY, Xperia neo, Xperia mini, Xperia mini pro, Xperia pro, Xperia active and Sony Ericsson Live with Walkman will receive their scoop starting from the end of May/early June.*
[...]
*The availability and scheduling of this software upgrade and specific models upgradeable to Android 4.0 will vary by market and carrier requirements.