To me, this is good. Of course I am biased, b/c I am not one of those who has been given the second chance. Well, maybe I was, although it was not a real one - my STBXH was only using me financially since he lost his job and had no place to go (soon as he got a new job, he left).
But from what I hear, she is at least serious about getting back with you. Now like you mentioned, whether she wants that life back b/c of her love for you or because she has had a bad year and wants a "better" and "safer" place, which is the life with you, that we do not know.
But especially when you have kids, I am a big believer that you should try everything to keep the family together. Although I agree with everyone that this time, she really has to make serious efforts to convince you that she is there for real.
Good luck and this may be a good sign that things will be good in 2006 for you.