I don't keep a baby book, so this will have to serve as a reminder for posterity!
A few nights ago Lucy slept from 8:30pm until 6:45am! I would definitely call that sleeping through the night. The next few nights she only needed a little encouragement to go back to sleep and she would sleep from like 7:30-11:30, and then until 5:30am, etc. I'm definitely happier with that scenario than with the every 2-3 hour waking that she has been doing for all of her life.
And ... today she took her first steps! She's been standing on her own for a while now, but if she wanted to go somewhere, she would just drop down and crawl. Today I was sitting on the floor with her and she was standing and then just took two steps towards me! That was all, of course, but it's exciting anyway.
Here she is on her dino walker toy right after we got it about a week and a half ago...