We don't have a whole lot of info on this, but apparently Clockwork Recovery (a custom recovery image) has been loaded onto the DROID X. This could imply custom ROMs based specifically on Motorola's ROM may be finding their way to the DROID X. Also, this means if your phone "softbricks" (ie, bootloader not corrupted), you can makes a nandroid backup, and then restore it.

hiu

To be clear, this doesn't mean the DROID X has been unlocked, nor has the encrypted bootloader been circumvented, it just potentially allows flashing custom software to the system partition (ROM).

Source: @koush