One of the other participants remarked that Slideshare is "You Tube for professionals". I have to agree. I found varying degrees in the quality of the slide shows. Some have a lot of pictures and no sound, so the point of the original presentation is kind of lost. Some have a lot of text, so it is easy to follow even without sound. I have "favorited" several presentations which are for the most part all different. My account is: http://www.slideshare.net/roinoke . Below is just a fun (absolutely nothing to do with libraries) show about my favorite city.