This isn't the first time, or the 24th time either, that this has
happened...

Our 2000 Honda Odyssey frequently "locks out" the ignition key, so that
it is impossible to turn.

The dealer, whose service department I give absolute top marks to,
always says "jiggle the wheel" or "turn the wheel one way, then the
other."  We have never needed outside help to get the car started, but
I'm sick and tired of it starting only when it wants to.

Today, my wife went out to run some errands and couldn't turn the key.  
I tried and tried and I couldn't either.  I turned the steering wheel
from its center position until it locked in a sharp right orientation.  
No help.  Jiggled the wheel what little I could with it locked, and no
go.  I finally gave the ignition slot a good shot of WD-40, until it was
running down the steering column, and the key turned easily.

So she got home and 20 minutes later, same problem.  The thing really
won't turn now, and the WD40 does no good either.

At one point, the dealer had said that if the shifter is "rammed" into
Park and the car turned off at virtually the same instant, that could
increase the likelihood of this happening.  Being a logical and
disciplined and systematic person is not one of my wife's virtues, and I
suspect that maybe she's contributing to this problem - I've seen her
come back from things with the kids, and she does seem like she's in a
hurry, acting all harried and frantic.

At any rate, I'm looking for three things here:

1. Most importantly, how do I start the van?  Turning the wheel and WD40
have not helped this time.

2. Why does this happen some times and not others?  Until today, we'd
gone a pretty long streak without it happening.

3. Do other Honda owners have this problem?