Where's the 'Like" button. Would be nice to have a 'Like', maybe I spend to much time on Facebook...lol
Masons are a bit old fashioned. We tend to tell the poster we liked their post by replying. Like this
You could always click the icon in the lower left hand corner and "add reputation" to the post. It even gives you a space to comment. It's not exactly like Face Book, but it's a way of showing that you like what the poster has shared.