I am constantly on the lookout for Web 2.0 applications that my students can use. Recently my Grade 6's were given an assignment by their homeroom teacher to research a Canadian Prime Minister and put their information into a presentation. It's great to see students use an application like PowerPoint in a different way:
We used Slideshare to upload the PowerPoint and it gave us both the HTML to use in a blog as well as the URL. Cool stuff!