Waivio is another top notch demonstration of smart features on the Hive Blockchain.
@vancouverdining is the account that curate most of the content there, but I hope to see it grow.
It's like Yelp in someways, but also reminds me of a blog more than a review.
They have smart code to "add review" or "add rating" to the article, and when you do that, it registered the producer and merchant if you list them on the blog as well.
It seriously could compete with Google maps if it's adopted on main stream levels.