If Obama wins the November 2012 Presidential election - and I think he will - there might be some civil unrest or another Kennedy-Dallas (attempt) type of scenario. I hope not, but that's a possibility. There's a lot of crazies out there.
I don't think anything will happen on 12-21-12. I agree that Solar Storms might cause havoc anytime between now and/or in 2013. Better to be safe than sorry and prepare for an emergency as things do happen. Now that I'm moved, I'm working on my Prepper list...food storage nearly done, Bug-out Backpacks are almost ready.
IMO, the outcome of this year will make or break a large aspect of the John Titor story.
I don't know if anything significant will happen this year, but if it does, it may be something we haven't even imagined. I'm not expecting or worried about anything, but still, if we get to the end of this year with our world still somewhat peaceful and well as it it today, I will be very grateful and relieved.