I am a big fan of Slideshare service but recently I am using more and more Prezi (we all know the reasons). The only thing I miss from Slideshare is their social interactions on presentation page.
If you look at a presentation page, like this one http://prezi.com/woe8joq6qepg/ you see a tiny space for comments and there is some small social media icons.
You should redesign it, providing bigger CTAs for comments and social interaction. One good example is this forum. As you can see on the right of this post, there are some social media buttons and the thread below is really well designed.
In order to goes viral, my presentation page needs some ways to people interact.
Hope you hear me.