Looks like HTC and T-Mobile may be pushing ICS to the Sensation 4G sooner than expected, as the Sensation's support documents on T-Mobile's site just got an encouraging update:
Read MoreMay 2 News: The Android 4.0 (ICS) update for the HTC Sensation 4G has completed its testing process and we expect it to be available very soon. Please stay tuned for an official communication from T-Mobile regarding how and when you’ll be able to receive the update.