Please be aware that I did not write these instructions. I only posted them. Stetsonaw wrote these instructions. While comfortable in ADB and have rooted my phone many times in testing as well as rolled back the versions etc... I have no more insight into how or why it is not working for you. If you followed the directions exactly on a version 4 phone, this should work no problem.
Links to the necessary files are listed at the bottom.
Remember, I am not at fault if you brick your phone, now, proceed.
Connect your phone in charge only mode to install the LG Bootstrapper and drivers, or grab the LG Universal Drivers.
Change your USB Mode to Internet Connection
Go into Settings/Applications/Development and ensure USB Debugging is turned on
If all goes according to plan, you should see the ADB Ladybug icon in your notification bar
I updated the Rootzwiki page with the same info found below.
Busybox actually comes installed by LG on the Revo, how awesome is that??
Download the rageagainstthecage binary
Download the SU binary
Move these files to the same directory your adb.exe is in.
The > and # characters below illustrate the prompt
you should have, if you have the $ when you go into adb shell,
exit out and type 'adb usb' then go back into adb shell and
you should see the #
Open Command prompt (either use the Windows Key+R and type cmd or start/run, then type cmd)
32-bit users: >cd c:\program files\android\android-sdk\platform-tools
64-bit users: >cd c:\program files (x86)\android\android-sdk\platform-tools
Or >cd (whatever directory adb is in)
>adb devices (verifies you are connected)
>adb push rageagainstthecage-arm5.bin /data/local/temp/rage
(if the above command fails due to read-only, type 'adb usb' then 'adb root' to validate root status, then 'adb devices' again to verify connection)
>adb push su /data/local/temp/su
>adb shell chmod 777 /data/local/temp/rage
>adb shell ./data/local/temp/rage
>adb shell (If this gives you a $ prompt instead of a # prompt, type 'su', if that fails, 'exit', 'adb usb' like above.)
#mount -o remount,rw -t ext3 /dev/mmcblk0p12 /system
#busybox cp /data/local/temp/su /system/bin/su
#chmod 6755 /system/bin/su
Verify the file is in place w/correct permissions
#ls -l *su
After the ls command you should see the following returned by the system:
-rwsr-sr-x root root 26248 2011-05-29 01:09 su
At this point, you may way to remove the files you put in /data/local/temp (optional):
continue with commands
Download and install SuperUser from the Market
Thanks Zennmaster, _mrbirdman_ for finding the linux routes and birdman for helping me out, and droidx8971 for helping me find all the information possible!