Motorola just confirmed via Twitter that the Xoom will have an unlockable bootloader to aid developers in app development. Here it is, in no uncertain terms:
"The XOOM will have an unlockable/relockable bootloader that will enable developers to access hardware for development."
As the first Android Honeycomb tablet, it is vital for the Android platform that devs have as much access to the device as possible, so this is darn good news. [Twitter via Android Central Forums] Thanks to everyone who sent this in!