Exactly what I did.
I flashed clockworkmod recovery with the rom manager app.
I downloaded the bas file for purity and moved to the root of sd card.
I rebooted to recovery.
I wiped data, cache, and dalvik cache.
I chose install from zip and picked the purity zip file.
It installed and ran fine, once it as up I moved the Xoom file to the root of my sd card.
This is where I think I went wrong, I wiped data, cache, and dalvik cache instead of just cache and dalvik cache.
After that I tried booting and now it loops the boot video until the battery dies.
When I try running the batch from this site
Droid Bionic gets Fastboot Recovery files for broken software and bricked devices | TalkAndroid.com it says: FAILED (status read failed (too many links)) after it tries to flash system.img over.
I moved the recovery.img file to the same directory my fastboot.exe is and entered fastboot flash recovery recovery.img
it says "sending 'recovery' (4018 KB)..." and stays there forever
None of what I've done caused any changes to what my phone displays. It says OK to Program and USB connected.
I'm almost certain I'ts not my computer, I just put it together a couple weeks ago and the windows install is fresh. Still, I'm gonna try installing everything on another computer to see if it fares better. I'll let you know if it does, I'm not too hopeful though.