Hey everybody! I'm Jon Boutelle, cofounder of SlideShare. SlideShare is THE site for sharing presentations online. It's the best way to share powerpoint, pdf, and open office documents. It works kinda like youtube: you upload the document, we convert it to flash, and you can embed it back into your blog or social networking site. SlideShare uses Amazon S3 for all our binary file hosting needs. All the slideshows and all the original documents are saved on Amazon S3, and only on S3. I’m going to talk a little bit today about WHY.