This can work with the WP Discourse plugin. It’s possible to either publish all posts that are created through Press This to Discourse, or to limit which posts are published based on a tag or a category. Right now, this doesn’t work out of the box with the WP Discourse plugin, but it can be done by adding a function to your site. It can easily be added as an option to the plugin if there’s a demand for it.
3 Curtiram