Seth,
Here's that article I was referring to at the gym yesterday. During our little conversation.
http://www.universetoday.com/2008/05/25/2012-no-planet-x/ I think you'll enjoy it. The comments on the article are good too.
Call it ammunition, or whatever you'd like.
Like one guy says, "Very thorough, not that I expect it to convince any 'true believers'."