New reports this morning are suggesting the update to the late Android 2.3.4 Gingerbread is currently underway for the European model. The update hit a few unbranded Germany roaming HTC Sensation phones but should be rolling out to other carriers throughout the next week or so. As far as I know there hasn't been any word regarding an update for the Sensation but this could be a good time to include some fixes and update to the latest OS version.
Folks that have received the update are saying it was around 41mb and was a fairly fast and easy process, as well as bringing the phone software version up to 1.45.401.2. We are still waiting more details but it appears to bring GTalk video chat to the device as a standard option instead of using things like Qik or other options.
As always with OTA updates you'll find a few software tweaks, bug fixes and some performance enhancements so hopefully this update will start hitting other carriers soon. We haven't heard from HTC regarding the update but most likely it should start rolling out to other carriers and possible other regions too. The T-Mobile Sensation 4G here in the states is still on 2.3.3 and I know I've had a few readers ask when it will receive 2.3.4 so hopefully this clears up things a little bit as its already started.