I'm with SPAZZ on this one. My VX has exhibited the same behavior the entire time I've owned it. Occasionally it will just die - sometimes at a light - I have to drop it into neutral, start and goose it a little to get it to drive. After it sits for a while I can get in it and it starts right up - sometimes at high idle - after a while it stops doing it.
I've tried different fuel, changed gas filter, pcv, cleaned throttle body, ect. It still ocassionally does it - doesn't throw a code or anything (unless I jerk it into drive too quick after restarting in neutral - then the tranny light blinks until I restart).
I've gone so far as to think it's humidity related.
Initially I took it in, but the techs couldn't find anything wrong with it and couldn't reproduce the behavior. I've learned to live with it.
-- John