This is such a cool idea! I'll get a picture of me tomorrow, but I think for my first picture I'll use the picture I had someone take of me on the day our new puppy came to live with us on 1/24. Of course, as I was clicking away no one offered to take a picture of me, I had to ask. hmph.
eta: Oh! I just remembered - I started a new job (the first paid employment in 17 years!) a couple weeks ago, and my second day there they took a new staff group photo. So, that can be my week 3.
This idea is going to be cool for me in another way - I've decided to grow my hair out. My last haircut, which was my usual super-short, was back in October of 2012.