What exactly is Motorola doing to stop custom ROMs from being developed / installed? Locking down the bootloader? Or something more insidious?
Whatever they're doing, it seems they're not doing a very good job as all of their phones have been rooted shortly after they were released. Where there's a will, there's a way.
EDIT: I didn't realize that a rooted Droid X still cannot load custom ROMs due to the locked bootloader. What a bitch! I'm sure someone will figure it out eventually, for now I'm glad I've got the Droid 1.