I have just successfully rooted and unrooted my droidx i had to leave work so i can't do a write up but i have been able to remove su busybox and superuser.apk from my phone and it's not a brick :-) keep in mind while root i did not remove and bloatware just installed wifi tether
I hope to have the instructions up soon
Sent from my DROIDX using Tapatalk
* update *
here are the instructions for unrooting the droidx enjoy and dont blame me if you get a $700 paperweight but this worked just fine for me i will try and do a video of the whole process if i need to for any non believers
i am not to blame if you brick your phone by trying this but i just did all the steps again and everythign worked out just fine for me now i had not removed any apks from the phone only installed wifi tether
okay to un root you device you need to go back to the folder where you droidxroot files normally
for me this was c:\droidxroot_v2
then do follow some steps from the root process
Run "adb push exploid /sqlite_stmt_journals/exploid"
Run "adb shell"
Run "cd sqlite_stmt_journals"
Run "chmod 755 exploid"
On your phone, navigate to a screen where you can switch wifi/bluetooth on/off easily (settings, or a home screen with a widget)
IMMEDIATELY after executing the next step, toggle wifi or bluetooth off and back on
Run "./exploid" and follow directions on screen. Once this completes you'll be back at a shell prompt.
Run "rootshell". You'll be prompted for a password.
Type in password "secretlol" and press Enter then you are root! (You'll know because your prompt will now be a "#" instead of "$")
now this is were things change instead of copying the files we will remove them
finally remove the rootshell
now keep in mind i did not remove and bloatware apps please try and too a wipe before attempting this if you removed bloatware to ensure it will come back as it should