That's no fun. Pull the battery, reboot back into recovery, and factory reset. Sucks, I know. You'll have to reinstall all your apps and set up your phone again. But it should boot the phone.
I went back and reinstalled and had to manually install update from SD and its now booting. Your HoB is freaking awesome. I didn't loose anything. Now to go back in and root!!! You Are the Man!!!