Just saw this article.... looks like they are rolling out 2.3.4 to HTC Sensations in Europe....
European HTC Sensation gets Gingerbread 2.3.4 OTA update - GSMArena.com news
T-Mobile - When for the US?
European HTC Sensation gets Gingerbread 2.3.4 OTA update - GSMArena.com news
T-Mobile - When for the US?