Ian has his first two teeth! Tooth #1 appeared on October 28, and tooth #2 came exactly a week later! I think more teeth may be on the way, judging from Ian's constant demand for teething rings.
Paul taught Ian how to sit up from a crawling position. Ian was half-way to a sit, and Paul helped him with the rest of the motion. After the help, Ian pulled himself to sitting several times! It's not a regular occurrence yet, but it's exciting nonetheless.
Ian isn't quite crawling yet, but he can scoot around the floor well enough to capture any toy he wants.
He's an awesome little dude.