I've had the Outbrain stars on my blog and vote option on my feedflare for a while. I like the ease of use and I like the anonymous feedback.
I recently got on to the beta to add the Outbrain recommendations widget. You can see the most popular stories (by rating) have been added to the top right of the blog.
I'd encourage you to start rating my blog posts. Why? Outbrain learns what you like and starts to make recommendations for you. Think of it as a personalised and content sensitive widget version of Google News.
There's a catch; it needs enough data before it can start to make recommendations. Does anyone know of any other search related Outbrain blogs? I'm inclined to start reading them so I can start building up my Outbrain profile.