As I am in the process of preparing a couple conference presentations, I found Kathy's advice on the use of PowerPoint quite timely. You might want to check it out.
I am almost always a big fan of what goes on over at Creating Passionate Users, and this post is a good example of why. It is as applicable to me as a teacher as it is to companies trying to design and sell products or services. It is about connecting to people. I read it all the time and am seldom disappointed.