I can answer the question about Tatupu as I live in Seattle and get the "pleasure" of watching the Hawks every week (they were actually pretty good this week).
My observations
Martz likes to throw the ball downfield to the WRs. Cutler needs time for them to run their routes, which he didn't have a ton of on Sunday. He didn't seem to check down a lot, I don't know Forte's catches, but there weren't a ton. Tatupu was playing the middle zone, but it seemed like most of the throws were to the outside. Bears didn't run it a whole lot and the front four stopped them quite a bit. He was around the ball a fair amount, but the way the Bears play, it can be tough on a mediocre MLB (I'm now relegated to thinking that about Lofa- hope I'm wrong). Beware about that in future Bears games as well, b/c I could see their scheme hurting IDP lb'ers. There is a big chance for sacks though, Tatupu just didn't get any (almost got one but Cutler stepped up right into Aaron Curry who snagged it)..
But, he was in there for almost every snap (if not every snap) that I saw.