Honda "Drive by Wire" question... what if the power goes out?

Hi there.

I have been looking at the new Honda Civic, it's pretty sweet, and the
welds and everything are as nice as anything I have ever seen. I just
have a question about the "Drive by wire" system that they are supposed
to have.

What happens if the Engine dies on you? In my current car, my timing
chip went once and the engine went out. I had enough steering control
left, even without power steering, to pull my car over before it came
to a stop. If the drive by wire system has no "real" or active
connection, how can it work if the engine or electronics quit on you?
Are there any backups built into the system in case any of that stuff
happens? And what if your battery dies and you need to push the car?
Can you turn the steering wheel to adjust your wheels when you push the
car?

Much thanks, sorry to bother.

David