Help... Rooting with Unrevoked 3 & 4. Installed OTA. Stuck @ Triangle

[supdawg]

I was following this instruction set found here: http://androidforums.com/evo-4g-all-...-2-rooted.html and I got stuck on 4D.

To make matters worse, I accidentally accepted the OTA install, and my phone has been stuck on this black screen with a white triangle with a yellow exclamation point and an android guy.

My phone appears to be frozen as it hasnt changed from this screen in 10 minutes. I am afraid to do anything with the phone with fear of bricking it.