I used to have a checklist to specify my requirements for the various audio, video, podium, and cable components. In recent times I have concluded that the world has had enough Lotus Freelance, Microsoft PowerPoint, and Apple Keynote presentations. When there is need for slides, I use Prezi, but generally I find good eye contact with the audience works better than slides. All I need is a high quality sound system. I take care of the rest.