YouTube for PowerPoint

Last fall when I was doing some research on Web 2.0 trends I found a site called SlideShare. The site lets people upload their PowerPoint presentations and share them in much the same way as YouTube. For hot topics like Web 2.0 it was another great place to look for information but I became a bit frustrated when I realized that you could not download the presentations. Since then I've gone back one or two times but found that the site had become cluttered with less factual and more entertaining presentations. Now it looks like they are trying to drum up some new traffic and have added the ability to download the presentations (given the owner's consent). They are currently running a contest for the best slide show. Check out their site and feel free to vote for my entry.