Google Presentations, a component of Google Docs has added new features. The most significant new option is the ability to create embeddable web slideshows that can be put up on any page, much like a YouTube movie.
The web output uses scripting rather than Flash unlike YouTube -- it will be interesting to see how Google copes up with animations and transitions in its Presentations through this output option. Maybe that's something they will take care of in the future since they don't have animations and transitions available as of now in Google Presentations.