This year there were some pretty good deals. That probably had something to do with the fact that we had a pretty mild winter well into January. I didn't see very many cheap flights in 2006 though. If you are flexible as to where you stay and when you go, you can take the risk. We book our flights well in advance to get the dates we want and so that we can stay where we want to stay.
I'm not sure if that helps or not. Good luck
