MBA not booting after 10.6.5 update

I just updated my and my wife’s laptops to 10.6.5. My update on my MBP went fine, but my wife’s MBA won’t boot.
Everything appeared to be going fine until the update was finished downloading and I was prompted to restart the computer. I hit restart, the computer thought about it for awhile, and then it said that “Software Update canceled the restart”.
I hit restart again and it seemed to be doing what it was supposed to be doing, but then after the restart tone, a dark (ominous) screen came up with a bunch of code and a message that said something to the effect of
“You need to restart your computer. Hold down the power button until it shuts off, then push the power button again”.
When I do this it just repeats the cycle and results in the same message.
Help!
One thing to note: I started the update process (downloading) and then left the computer for a while. I figured this would be okay because the power adapter was attached, so the battery wouldn’t die on me and the process wouldn’t be interrupted. The computer was asleep when I came back to hit restart. I’m guessing this is what may have caused the problem.

anybody?

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