My Nexus One die after update to 2.2 via OTA

I was expecting to receive update notice for whole week...but it just the beginning of my nightmare.

I just followed the instructions and Android Robot appear on the screen.

Then, it restart and show four colors "X"


And always "X" for 1.5 hours

I tried to remove the battery and restart again but it just shown "X"

I've searched suggestions on internet and entered to HBoot for factory reset

it's still die there...

My Nexus One die after update to 2.2 via OTA...