Some months ago, Mari pointed me to a great site called Presentation Zen. This is now one of my favorites sites on the web. This site (really a blog) is compiled by Garr Reynolds, who used to be at Apple and currently is at Kansai Gaidai University where he teaches Marketing and Multimedia Presentation Design.
The site is basically a compilation and analysis of superb presentations that Garr has seen (along with a few terrible ones). Some presentations use only images, such as this one by Al Gore. I have seen this one in person and can vouch for how powerful it is.I also like the "Takahashi Method", which basically consists of putting one word, letter or symbol - in giant type - on each slide. I tried this about six months ago, and it had a big effect on the audience.
If you make presentations and are interested in getting your message out and across more effectively, check this site out.
