I have s-off my sensation with hboot 1.18.000 and flashed the stock European Rom and now geeting the official OTA update........
if some one needds help guide is here
s-off by this method here
change CID to HTC__001
flash the stock ROm RUU
then boot into recovery
fastboot oem writesecureflag 3
you are done with stock rom and s-on back
check the software update and will get it.
i am downloading while typing