Back in May, HTC announced that they would no longer lock bootloaders, but they could not ship the Sensation or the EVO 3D with the capability. It looks like HTC will officially unlock them staring in August with the global Sensation, followed by the Sensation 4G and the EVO 3D.
They are currently in the testing phase now, and they expect to be fully operational by early September for devices that have received the software updates. They also plan on rolling out the unlocking capability to other devices as part of maintenance updates and new shipments.
Kudos to HTC on fulfilling this promise and getting it done timely.
Hit the break for the full statement