It's still done via shortcodes. You can display as little or as much info as you like. The whole point of the plugin, though, is to get you entering the info in one place (the readme) and pulling it in to your personal site. You could just block those pages from search engines if you're worried about duplicate text. It's not search engines who are going to be impressed with your plugins, it's people! If you don't mind writing two slightly different versions of every plugin description and every plugin FAQ and every plugin changeset... carry on. If you'd like to do it once and be done, you might be interested in this plugin.
