Well, some of the questions I was happy to know about in advance were along the lines of: ask me something you normally wouldn't ask, tell me something about you that isn't on your resume, the always-fun where do you see yourself in five years, what was the topic of the writing competition and how did you answer it, and so on. It was also nice to know if they asked standard questions, or were a "tell me about yourself" type of interviewer.
I just think it's just nice to know in advance what they're going to hit you with, and if you can get that info from your classmates who went earlier, great.
As for morning v. afternoon regarding the "freshness" of the interviewers, I've seen no correlation between time of my interviews and call-backs that I received. Seriously, it's really impossible to predict who/when you are going to connect with these people.