Regarding Milledge scoring standing up or sliding, if you look at the play, if he slid, the play would of probably been a lot closer and leaving it up to the umps in Philly is like playing Russian Roulette. By going in standing he was able to get his foot on the plate, making it too late even if the catcher was able to make the tag. The throw to the plate was off line as well.
I don't think he was worrying about injury or anything fancy. He was meaning to score and that is what he did. It was a smart move, he scored, we handed it to the Phillies, and if the announcers want to whine and complain with displaced displeasure, let them look like idiots.