Android users have spoken, and maybe, just maybe, Motorola actually heard -- AusDroid claims to have a statement direct from the mobile phone manufacturer promising unlocked bootloaders later this year:
We completely understand the operator requirement for security to the end user, and as well, want to support the developer communities desire to use these products as a development platform. It is our intention to enable the unlockable/relockable bootloader currently found on Motorola XOOM across our portfolio of devices starting in late 2011, where carriers and operators will allow it.
Wonderfully corporate of them to pass the buck to the carriers, no? This quote comes by way of a gentleman who petitioned Moto for just such a thing, mind you, so please take it with a grain of salt, and you'll be the first to know if we get confirmation from Motorola itself.

Update: AusDroid managed to get in touch with Motorola North Asia, and it sounds like we're looking at the truth -- let's see if Sanjay Jha agrees when he wakes up tomorrow morning.