Beginning a blog on weight loss

So here it goes, I have been reading and reading all kinds of blogs and wonderful weight loss success stories. I thought I might join the others who have used blogging to help them achieve their weight loss goals. I promise to be very open and am really just doing this for myself to help me with my goals and to document all that I am doing to affect change in my life.
A little bit about me. I am a 34 year old mother of three children, ages, 8, 7 and 4. I have been overweight for much of my post-pubescent life, literally from the time I "became" a woman, until now, I have struggled with my weight. There have been many times in the past where I have done very well to lose weight and just as many times where I have given up. When I was in college I managed to actually lose the freshman 15, rather than gain it. I worked out all of the time, walked to classes and made an effort to be involved in recreational sports. But then I graduated and began a sedentary job as a secretary and then my mother died, which again prompted me to eat emotionally and lose all control of myself. I gained a lot of weight. Then I went through a few gym joining phases where I would work out for a time and then lose my way. I got married, and then quickly had three children from 2003-2007. A year or so after the last child was born I tried very hard and was able to lose about forty pounds. But stopped short of reaching my ultimate goal. This time I intend to reach my goal and hope that by putting everything down in this blog that I will be extra motivated to keep going, even when the going gets rough!
I know I can go for three months, I have done that before, but I really need to remain consistent and keep going and reach my goal.
So here we go, the stats, the information most will be interested in and is terribly embarrassing to admit to.
My weight: 230, there it is. Wow, that's crazy to write and I am very embarrassed by getting back to this weight again.
But that's why I am here, to get rid of it.
My height: 5'6"
My goal is to reach 150 lbs. I will do this by losing 1-1/2 pounds a week until I reach my goal, which should be March of 2013. So I am intending to go slow and do it the right way with improved eating habits and exercise.
For exercise, I have been walking on a treadmill everyday. I have been walking for about a week now. I walked today for about an hour and a half at a speed of 3.3.
Here is a beginning photo of me, one of my girls took it today, it's very unflattering, but that's the point I suppose!