I signed up on a few microstock sites hoping to recoup some of the cost of my camera. These sites provide FTP access for easy uploading photos. Lightroom doesn’t come with an easy way to publish or export photos to FTP site.
But Lightroom SDK comes with a free sample plugin that can export photos to an FTP site. It works really well and is very easy to install. I learned this at LightroomSolutions.com.