It is on the message board, but not physically integrated into their website as an actual hoax. If you search on their website search, there are several official Snopes Mohammed Atta references which pass judgement on various other aspects, but nothing about this subject.
This is the same link I posted earlier, saying there is discussion, but it has not advanced beyond the message boards, which is no different than us discussing here on Free Republic, as far as I know.
The key to knowing if this is true or not is to find out if the person who wrote it is a real person and stands behind his story. If that is the case, anyone can say it is impossible, but hey, if this guy says it happened, we can only call him misinformed or a liar, depending on his presentation.
Good God. Listen to us. Next they will be getting phone calls sayin "Hi, this is such and such from Free Republic, and we are doing some investigation..."
Well, heck. We gotta be better at it than the NYT, right?
The person who is floating this hoax obviously knows that most of the hijackers were Saudi, so he (or she) assumes Atta was Saudi.
The rest of the story is equally preposterous.