Many posters hating powerpoint.
Just as it bothers me how some people cannot make a presentation without Powerpoint, it bothers me how much hatred there is for Powerpoint being spewed here.
Just like any other method of presenting something, Powerpoint has strengths and weaknesses. On the pro side, it can display a lot of information very quickly; on the con side, it can display information too quickly for your audience to understand. On the pro side, it can provide animations and diagrams that you could never produce on a chalkboard; on the con side, it can quickly become cluttered with meaningless charts and distracting transitions. On the pro side, it allows you to move a presentation from one computer to another with portability not seen on any hard media; on the downside, it locks you into using projectors and computers. The list goes on and on...
... and the same list exists for every other form of presentation media, ever. There are always some situations that a form of media is ideal for, and situations where it is inappropriate. You must always consider the audience, the surroundings, the subject matter, the skills of the presenter, and the resources available.
I believe the Afghanistan Powerpoint link given above is the perfect example of people blaming the messenger. The slide shown is a chart of the interactions between
every major power and resource in the longest running war America has ever seen. This chart is not complicated because Powerpoint is a bad program. It is complicated because it is graphically mapping a ridiculously complicated situation. When the military states "When we understand that slide, we'll have won the war" they are absolutely correct, because then they'll actually understand how to control every aspect of the war they're fighting. Blaming the complications on the media that shows you how little you know is doing nothing but digging the hole deeper.
Powerpoint is a tool. I happens to be a very powerful tool. Learn how and when to use it properly, and you will be a good teacher. If you let a few bad users prejudice you against using it, you're holding yourself back just as much as if you used it poorly.