Here’s an excellent site for creating and sharing presentations…Myplick.

MyPlick - Web 2.0 presentation tool

Myplick says:

Myplick is a free service that lets you share, embed and discover presentations and slide shows online. You can upload your presentation documents in a variety of formats such as powerpoint, pdf, openoffice odp, etc. If you need to add narration or sound effect to your presentation, you can upload an audio file and have the option to synchronize the audio with your slides using our online easy-to-use sync tool. Once a presentation is made, you will have the choice to either publicly share with everyone or only share it within a small private group. You will also be able to find out how users are viewing your plick, for example, how much time people stayed on each slide. User feedbacks and statistics like this will help you to improve your presentation making skills.

What is a plick?
The word “plick” comes from p(resentation) and (f)lick. It is our goal to put online presentation experiences so lively that watching a presentation on myplick is like seeing a flick.

Who should use myplick?
Whether you come here just for fun, or are looking for useful and educational materials, myplick is the right place for you.

If you have fun PowerPoints that you would like to share with others, you don’t have to email it around any more, just plick it.

If you have delivered a presentation, and would like to reach more audience, just plick it.

If you are a blogger or a podcaster and would like to add more spice and richer experience for your audience, you guessed it, just plick it.

Since we index and extract the text contents of your presentation, we make it easily searchable by major online search engines. With slides and audio synchronized, people can also navigate your presentation better.