I see it as a way for more of the regular Pythonista users to chat and collaborate about the app or larger projects they are working on before sharing it on the forum where everyone can view it.
I like this idea. The one reason I like slack over RocketChat is the push notifications (which id love to have on this forum)
If you'd like to host it somewhere other than heroku, I can certainly put it on my personal web server. However, the heroku.com extension is probably much easier to remember than the deentaylor.com extension 🙃