Anybody know of a WordPress plugin that adds functionality similar to Facebook's "like this" thumbs-up button?
In other words, instead of leaving a comment someone would click a thumbs-up and it would say that that person "liked" the blog post.
This functionality is different from most thumbs-up or star-rating plugins, which indicate only the amount of stars, thumbs-ups, etc.---not who specifically approved.
I haven't been able to find it while searching Google, but that could just be because I'm not sure what to look for. As you can imagine, "Facebook," "like this," and related terms aren't conducive to good search results.