Sony Ericsson have updated their ICS rollout for 2011 Xperia handsets.

The initial handsets receiving the upgrade will be the Xperia™ Arc S,  Xperia™ Ray and Xperia™ Neo V models, and the table on the site shows the date based on your handsets Sales Item (SI) which you can find in the location shown in the picture below.

Source: SonyEricsson