Slovenian company "Zemanta" which specializes in web 3.0 technologies has developed a great blogging plugin.
I recommend the video to see what the plugin is capable of.Have your browser understand what you are blogging about and suggest pictures, links, articles and tags to make your posts more vibrant. We are making blogging fun again.
Their API is currently in private testing but can probably be obtained after contact. I think Zemanta plugin for Joomla would greatly benefit the community.