Doug nails it in reacting to the news that Luol Deng sat out of a practice this week. While nothing to get that nervous about, Deng is, by definition, not 100%. But that said, I'm all for precaution in training camp and preseason. It's just another reminder how tenuous predictive success is for this team...a lot of things have to go right.
And a bonus link for you: By the Horns did an interesting study on not just Derrick Rose's assists last season, but what types of shots he assisted and their associated successes. The bad news is that Derrick Rose isn't creating a lot of easy opportunities for his team. The good news (I guess) is that it's likely not his fault, but the lack of finishing big men.