There is one other thing that nobody has thought about yet...
DESERTS MOVE OVER TIME.
So even if someone from Atari who was involved in the burial (which i still dont believed happened) told you the EXACT location of the thing, it probably wouldn't be there now. It could be miles away from the original location.
Pity George W Bush isn't still in power... He could pretend it was the Iraqi deserts and turn the whole fucking thing into a crater.