Hopefully they also have opinions on different topics.... 

http://www.anti-powerpoint-party.com/the-cause/horror-slide-of-the-month/

"For a while we have been giving an award for the “horror slides of the month". Due to the suffocating amount of mail received we cancelled this competition. The slides were more or less the same. One can practically put 90 percent of the billions of slides shown throughout the world every month in that collection. Below you find a few specimens from that horror cabinet.

Attention!

The fact, that you laugh about these horror slides, should not lead to the conclusion that it would be enough to fight the excesses and that THEN PowerPoint* would be OK … . No, far from it,  It can be proven that EACH slide containing text, a diagram or a schematic illustration has a drastically reduced effect compared to a real human creating something on a flip-chart. This is due to the fact that the effect of an illustration is not generated by the result but by THE ACT OF CREATING the result. It is the latter that provides the effect and not the result itself. That is the reason why PowerPoint* can not work.

While smiling do not forget that we take our cause seriously!"

This slide from the US army gave a clearly laid out representation of the influence of various factors on the war in Afghanistan. General McChrystal, to whom the slide was presented, commented as follows: “When we understand that slide, we’ll have won the war”

http://www.anti-powerpoint-party.com/images/photogallery_fullsize/0218/1.Afganistan%20stability.jpg

Politics aside, presentation programs have come a long way since I learnt Harvard Graphics in my teenage days. I find that today, PowerPoint's biggest flaw is its continued reliance on linear slide-after-slide structure, making it hard to tell real-world stories.

Recent alternatives to PPT:

I've found prezi.com a brilliant replacement. The bad news is - it can consume more time to create a truly effective presentation.

http://prezi.com/4jrranugjj6p/turn-a-powerpoint-to-prezi-prezihelpcom/

http://www.sliderocket.com/ (recently acquired by VMware) is closer to PPT, but is built around the idea of presenting to an online audience, for eg. it has some social networking functionalities.