I have a fellow that I have been talking to who is very concerned with the Mayan Calendar / 2012 doomsday stuff. He wants to know what evidence we have that nothing will happen on 2012. Galactic/Solar/Planetary alignments, gummint conspiracies, geological/magentic pole shift, etc...

Anyone got the Straight Dope on this? I'd appreciate it, and I know the fellow would too.