Slidex - youtube for the presentations

Everyone knows Youtube (http://www.youtube.com) - the place to look for videos. But do you know where do you need to look to find an interesting presentation about origami?

Slidex (http://www.slidex.co.il) is a rather new website (currently in Beta mode) that will let you share your presentations with others and enables you to find the presentation you were looking for. This can be a very powerful tool for anyone writing and working with Powerpoint.
Enjoy.