I have only owned my 2005 limited coupe for 6or7 months, so I am by no means an expert on this (no start thread,) I will just tell you all of a similar problem I had a few times,

I am sure this is not what is going on with most of the starting problems out there, but might be the reason a few folks are experiencing trouble starting,
I have noticed a few times, when dropping my wife off at the store, and shutting engine off, then after deciding to move my car, ignition seemed to lock up, and would not start. After I removed the key, and tried again, it started right up.
I think that has something to do with the anti-theft thing with the key not starting after being shut off for a short time.
Just something I am throwing out there, im sure it is not the reason most of you are having trouble.