I have been slowly uploading my PowerPoint presentations to slideshare for about a year now. There's a link to the left to see all the shows I've uploaded. I originally found this site when my mentor sent me a link to one of her presentations. It's a great place to showcase and share PowerPoint presentations. However, there are a couple of problems. When I upload my presentations, I lose all the animation and transitions. In addition, I can't (or couldn't) add audio to my presentations. However, slideshare now has the option of editing my presentations to create a slidecast. A slidecast is similar to a screencast (see Camtasia or Adobe Breeze) which allows the designer to demonstrate how to complete computerized tasks by showing step-by-step procedures. Slidecasting, on the other hand, is a multimedia format for viewing slide decks synchronized with an audio file.
I haven't had a chance to edit my current presentations to add audio yet, but I'm definitely going to try it out soon. Slideshare is currently conducting "The World's Best Presentation" Contest. I've entered one of my educational presentations on the 4-Square Method of brainstorming and organizing an essay. Check it out and place your vote today.