The Droid X's bootloader may remain locked up tighter than Fort Knox, but thanks to some industrious users from Alldroid the Droid X community at least has root access to sooth their pain.
As the question of why you would want to root always comes up I'll go ahead and answer it now. Some of the advantages include the ability to use WiFi tethering without shelling out extra cash to your carrier and access to a number of "rooted only" apps in the market including a variety of backup options for your phone.
To reiterate this is only root access and won't allow you to flash new ROMs yet although I'm sure there are many dedicated folks plugging away on that if for no other reason than to prove to Motorola that they shouldn't have bothered locking the bootloader in the first place.
The instructions and download can be found by hitting the source link below. This method does require you to use command prompt/terminal and that you have ADB setup so it is a little more complicated than some of the one click options that have been circulating of late, but if you are having any trouble I'm sure someone here will be more than willing to offer their advice.
Let us know how it goes for you and happy rooting.