Google released an update to Google Docs, that lets you embed a presentation into your own website. Google calls this "the mini presentation module", but it's more like a YouTube player that happens to display a presentation. Unlike YouTube, the embedded presentation doesn't use Flash and there's no auto-play, so you need to manually advance to the next slide. Just switch to the Publish tab and hit the publish button – you will now find some inline frame code Google to copy & paste in you website / blog.
Google's presentation app uses a lot of memory, doesn't have an export option and it's impossible to use if you want to create a decent presentation, the new viewer is a good option if you want to add an existing presentation to your site. You only need to upload it to Google Docs, publish it and then copy the code.
Other sites that offer presentation viewers are: Scribd, which accepts many other file types and has a multi-file uploader, Slideshare doesn't require login and has a file size limit of 30 MB. Surprisingly enough, none of these two sites offer auto-play and, even if it has the most advanced viewer, Scribd requires to scroll down to see the next slides.Google, Presentation, Google Presentation, Google Docs, YouTube, Internet Video, New Features