According to alldroid.org and a guy named Byrdman the X has been successfully rooted. not sure for sure if this allow complete root access like the Droid 1 root but few people said it works.
DROID X IS ROOTED! (ADB and Shell as SU with System mounted as R/W, NO Flashing or bootloader yet) - Motorola Droid X Rooting - AllDroid Public Board - DROID X IS ROOTED! (ADB and Shell as SU with System mounted as R/W, NO Flashing or bootloader yet)
DROID X IS ROOTED! (ADB and Shell as SU with System mounted as R/W, NO Flashing or bootloader yet) - Motorola Droid X Rooting - AllDroid Public Board - DROID X IS ROOTED! (ADB and Shell as SU with System mounted as R/W, NO Flashing or bootloader yet)