I echo specepic's comments too. I went through the process this last year, so it's fresh in my mind. I viewed the PPT presentation as answering the questions that all the applicants had but didn't want to ask. For example, "how many days am I going to have to take call?" "Do I have to drive to 5 different sites?" "Do we get lunches covered?" "Can we moonlight?" "Will I have time to see my family?" "How much vacation do we get?" All those things that we felt would make us sound lazy or superficial, but were honest questions.
Additionally, everything that is on the web site was nice to have laid out for us - full 3-year schedules, locations of hospitals, # of residents, outside opportunities, program strengths/weaknesses, research opportunities, etc.
The bane of our existence in interviews was the question, "do you guys have any questions?" Especially at the beginning of the day, when we haven't seen anything yet. Of course, feel free to ask for questions, but don't pause for an awkward minute for someone to feel the need to ask something 🙂.
The worst presentations, in my opinion, were the ones that had too little information and were talked about too long. The ones that had a lot of information, but were quick, were the best. I felt that I had about 5 or 6 things I was truly interested in learning from the presentations, and I got those pretty quickly when the slide came up. And I could always ask to see slide #5 again, if necessary.
Hope that helps! And thanks for getting feedback for this stuff - it's the best way to improve a program. It shows on interview day, I promise you.