Tried it twice, followed the instructions to the letter, and both times it failed. No errors, it just wiped out all the data but didn't root anything.
So here are the instructions that I followed, and I will highlight where things went wrong:
Step 1) Install HTC FastBoot driver
Step 2) Go to REVOLUTIONARY and follow the instructions to download the file revolutionary-0.4pre3.zip. It will require you to know your cell phone's serial number, and what version of HBOOT you have.
Step 3) Plug your phone in, select "usb storage", and copy the Super User file to the SDCard somewhere (easiest if you don't put it into a folder on your SD card.) Don't unzip it.
Step 4) Plug in your phone, and when the prompt comes up, set to "Charge Only". Disregard any notices and don't install any additional drivers or whatnot.
Step 5) Unzip the Revolutionary zip file into a folder somewhere you can find it.
Step 6) Run the file "revolutionary.exe".
Step 7) Follow the prompts on the screen. It's pretty straightforward. It will reboot to HBOOT a couple times, the last time you'll see it at the top saying "S-Off".
Step 8) It asks you if you want to install clockwork recovery. Select "Y". You'll need this...
You now have a permanent custom recovery on your phone.
Now to actually Root it:
Step 9) From the HBOOT, scroll down to "Bootloader" using the volume keys, and select using the power button.
THIS IS WHERE IT BOMBED. Instead of letting me scroll to Recovery, it asks me if I want to apply the update, hit volume up for yes, and volume down for no. If I select yes, it applies a bunch of updates which restore the phone to an "out of the box" state with none of her data, and there is no root installed, I never get the option to "apply .zip from SD card".
So it anyone can tell me how to manually launch into recovery on the phone without root, maybe I can go in and manualy apply the zip file and obtain root?
I am really disappointed in this method as they make a big deal out of how easy it is and how you don't lose any data, and yet that is exactly what it did and I followed the instructions precisely, twice.
Then scroll/select "Recovery" Yes, it seems sluggish...that's fine. Don't be impatient; it'll let you scroll at some point...
Step 10) Wait! You'll see the HTC spash screen for a bit, and then eventually you'll be into Clockwork Recovery
Step 11) Scroll to "install zip from sdcard" and select.
Step 12) Scroll to "choose zip from sdcard"
Step 13) Find the super user file (su-3.0-efgh-signed.zip) (it'll be at the bottom of the directory list if you put it in the base directory of the sd card) and select it.
Step 14) Sit back and watch the quick show... If all goes well, it will install and show you when it's finished.
Step 15) Reboot the phone (keep selecting "back" until you have the option to reboot the phone)