Google has started rolling out the new Android 2.3.6 Gingerbread update for Nexus S GT-i9020 devices for users located in the USA, Canada and a few other regions. However, the update is not made available to all Nexus S users in the selected regions.
This update, started last week, brought a fix for Voice Search. However, the detailed list of improvements has not been made available yet.
Significantly, after applying the Android 2.3.6 Gingerbread update several Nexus S users complained and pointed out the nixed WiFi and USB tethering. That might be the reason this update is not being released to the general public, but only to users who are bound to select carriers.
So far the update does not appear to bring any new feature to the table and all eyes are set on the Ice Cream Sandwich update, which is expected some time later this year.
Therefore, beware of getting the update from unknown sources.