Stuart's got the bottom two. They came in last weekend, and he had a rough time of it. We used Tylenol once, and it did help. The teeth literally popped up during a 4 hour span--I didn't think it would be so fast! But he whined and cried and was up every hour for about 7 days prior to them breaking through. It was pretty difficult for everyone involved. He won't chew on anything cold, either.
Has anyone been bitten yet? I got it good last night when he was tired and cranky and forgot what he was doing. I did the trick where you push him into the breast and it seemed to work. I took him off and had DH hold him for a bit. He wasn't pleased, but he didn't do it again.