We have integrated discourse with the Sci-GaIA website which means that visitors can start discussions on this forum, by clicking on a button on the web pages. The discussion is then seen at the bottom of the page, similar to Disqus.
This only makes sense on certain pages, however - clearly, you don't want people discussing the home page, or the stub pages. However, it makes a lot of sense to provide that channel to discuss what we are doing, regarding our activities and milestones, etc.
Here is a tentative list of the pages I think discussion should be enabled on :