Hi Swanny,
There was an interesting documentary on the box a few weeks ago (can't remember what it was called, sorry) about an ex-naval guy who's hobby was cartography, he put a fairly strong case together that put Atlantis in Bolivia.
He tied it all in fairly well. I will try and find out what it was called & let you know.
Perhaps someone else on here has seen it aswell ?
Found a link, the guys name was Jim Allen -
http://www.atlantisbolivia.org/atlantisboliviapart1.htm