Sample Slide Presentations
Slide sites are now now popping up all over the web, with these two I see as becoming the most notably so far; namely slideshare and slideboom. Slideshare has been around for a couple of years now and has recently added in audio - but slideboom has the advantage of keeping your powerpoint animations in tact (as well as any music and audio). Added to this, there is a niffty little ppt-to-flash converter that is free from the same company called ispring.
Here are a collection of better looking presentations from these two sites: -