It worked fine for me.
First flash with WP7.
Just booted to bootloader. Hold vol down, when turned off and press on button once.
Then just plug in the usb and run this file. No prob. Just like the WM6 days.
Cant unlock with chevron, not sure if its the Nodo or Chevron, in my case though. I have unlocked before, and done all the tricks on a fresh install. No luck, so i guess its not unlockable for now. Some guy is working on a wifi transfer, which forces the phone to think its from marketplace and therefore okay. Been told release is 25 March, so we can just wait.