Pretty much every blog and content site of any sort has social sharing buttons these days. Among these, Twitter is light and more open compared to Facebook’s walled garden of posts.
We encourage users to display their Twitter handle on their profile page
Twitter sharing button on the presentation page
Notify authors when viewers Tweet their presentation
Just put two and two together and we have a neat new way where authors are notified, via an @mention on Twitter, when someone tweets their presentation:
Now, this takes the conversation about their decks outside of SlideShare (which we totally encourage), creates real conversation and enables users to connect with each other. Social.