I'm mostly guessing your age because I want to know os badly!!
In the first pic, I would think you were in your mid to upper 40s. In the most recent pics, you look closer to mid 30s.
No matter what though, you look really great! This is a definite inspiration to all of us, I believe. I started SBD in Nov 2004 and lost 30 pounds and that got me down to 160. I've maintained that weight loss, but I need to lose 30 more pounds for my height so I've started P1 this week. Seeing these pics of you really does make me remember the accomplishments that are possible.
I showed my boyfriend and he wide-eyed at your weight loss! He thought it was quite amazing too, how much younger you looked. Wonderful job and thanks for posting this for us!!