I've been waiting a couple days as I knew this would happen very soon. This evening Nate finally flipped from his back to his stomach on his own. He has been flipping from stomach to back for a couple weeks. He has been so very close (I think his arm getting in his way was really frustrating him), but he just couldn't get all the way over. Soon after he was on his stomach he flipped back to being on his back. Before long he'll be rolling, then who knows what.
He is also getting very close to being able to sit up on his own. He can sit up on his own for a few seconds - then he tends to fall over. Nate will still be having milk for his first Thanksgiving, but he is getting real close to being able to sit up and possibly have some solid food.
Nate trying to roll over. When picture was taken he couldn't quite make it.
Here is Nate sitting up. He only stays up a few seconds.