I've developed a lot of Power-Point style presentations over the years. Firstly with carefully drawing on overhead slides but realising how wasteful they are anxious to use computer-generated. First with Amiga using Scala then with web pages. Edward Tufte hates the traditional PP for dumbing down presentations. Here an article on the Lawerence Lessig presentation style and here's a presentation on the history of BSD called (tongue-in-check) BSD is dying (Warning some slides might be offensive to some viewers).