UPDATE: Sitchin is discredited.
I don't follow the Planet X, Nibiru, Tyche, Brown Dwarf topic any more, but it's such good fear porn that it might be a good way in for one of you to learn about Sitchin's work. This audiobook is a good introduction to the impending potential disaster of a planet either bashing into us or whooshing by and sucking all the water out of that Nuclear Power Plant in Nebraska that the mainstream media are pointedly ignoring.
Sandbags and nuclear power don't go together do they?
However, I do keep an eye on Comet Elenin's activity. I don't mind saying I have my fingers crossed that its flight path is artificial and more purposeful than Dawkins random universe suggests.
If it is manned I pray it has a large crosshair aimed at the Pentagon. That would be worth popping a bottle of bubbly over.