I would like it very much if there could be an RSS feed for my "Posts I Like". This would ideally be private but easy to make public if desired.
Ideally one could then pipe this feed into a recipe at ifttt.com (for example) and send one's liked posts to pinboard.in or facebook or wherever.
At the moment I am using wordpress.com as a feed reader for the blogs I follow, rather than following them all in my RSS reader (feedly). This makes managing my follows a lot easier. With feedly, however, I can mark a blog post as liked and send this automatically to my pinboard, for example... but the WordPress channel on IFTTT doesn't provide the ability to do anything with "liked posts", only posts you publish yourself.