Update: If you've somehow inexplicably ended up at this article, please note, HTC has since announced the 3D will be unlocked (at some point) and their future policy is to have unlocked bootloaders on all devices.
It seems HTC has finally caved to what are likely the security demands of wireless carriers with its newest phones, and is locking down its handsets Moto-style. Latest case in point: the EVO 3D - which sports the same sort of security we found on the Sensation earlier this month. In other words, good luck cracking into this thing.
Before we get any further, there seems to be some confusion on what exactly is "locked down." Let's clear that up: the bootloader image itself is not encrypted.