This is just an FYI that Motorola is making MDW pull the update.zip from their site and there's no telling how long the mirrors will last, so be sure and grab it while its hot if you haven't done so already (or if you installed and are having issues and want to try a fresh download in case yours is corrupt)
That ruling protects the consumer for the actions they take on their phone, it doesn't cover people who leak software against a companies wishes. Sort of like you have every right to copy and back up a DVD or even a Blu-ray disk...but without very creative maneuvering it's illegal to create and sell software that does the latter.
Will i be able to recieve the OTA update if im rooted on droid x ?
Depends on which rooting method you used and what changes you have made. See this page for more info. If the current update.zip is the same as the OTA and you deleted any bloatware, modified system some system files (see the link) you will wake up to boot loops when you get the OTA. All is not lost, the sbf method can get you out but it is not for the faint of heart.