It is still a very rare occurrence, but Hallie has started smiling. In fact I witnessed one time when she smiled at Erin, it was beautiful. I don't have one yet but mom, Will, and Clementine the cat have all gotten smiles. I'm trying hard to get one, I think we're close. These pictures were taken when she was unusually calm, and we were trying to get her to smile.
It didn't work... before too long, we had this again:
I'm trying everything. Mom's suggestion to get her to smile: pretty shoes