The wait is finally over, T-Mobile USA releases ICS for the HTC Sensation. But once the update is installed, tethering won't be "free" anymore? With "free" I meant "included in their already ridiculously expensive plans for their lousy 4G service", of course.

Sure, their Terms & Conditions are pretty clear on that:

Your Data Plan is intended for Web browsing, messaging, and similar
activities on your Device and not on any other equipment. Unless
explicitly permitted by your Data Plan, other uses, including for
example, using your Device as a modem or tethering your Device to
a personal computer or other hardware, are not permitted.

So, while having (and using) this feature before, T-Mobile was simply not enforcing their own policies. But come on, guys - it's 2012: releasing a belated ICS and at the same time disable on of the more useful features (not to mention cluttering it with your "branding") seems like one step forward, two steps backward to me. With no CyanogenMod readily available, I guess I'm gonna stick to v2.3.4 for now :-\