Via Rob Fahrni, I see that Carson Palmer's injury is much worse than what was initially reported:

"Carson Palmer's knee injury was 'devastating and potentially career-ending,' involving numerous ligament tears, a shredded ligament, damaged cartilage and a dislocated kneecap, his surgeon said Thursday."

That sounds like a life impacting injury - never mind football. It didn't look like that big a hit at the time, but it goes to show - anything can happen when bodies collide. I think the Bengals need to look at whether or not Kitna is who they want to go with next year.