The HTC Desire S is beginning to receive an update to Android 2.3.5 in the UK. Sim-free devices are the first to get the upgrade, which also comes with HTC Sense 3.0.
HTC Sense 3.0 comes with a reworked interface on top of the Android base. Sense version 3.0 is also found on the massive HTC Sensation.
People who have the Desire S on Vodafone, O2 and Orange have also been gradually receiving the update.