Update from a proud father:
1) Today our son got up on his hands and knees and started moving for the first time. He was in the tub when he learned because it's easier than the army crawl he's been doing for a couple weeks.
2) I taught him how to grab his bottle and feed himself today
3) He spends 30 min at a time with his new interactive book he got for Christmas and makes it sing different songs by hitting all the buttons.
4) He now eats squash, carrots, green beans, applesauce, rice cereal, and pears/bananas/apples.
5) He is starting to give us kisses back
Must be the 6 month birthday on Christmas--all of a sudden he seems so much more developed