Deploying to heroku is a key feature I'm looking for in a CI/CD service. I presume that that's an integration you have on your roadmap, but I didn't see any public issue / discussion of it, so here's a start?

Aside from the simple "deploy this revision to heroku app XXX" use cases (on each tested commit, or maybe only when a tag is bumped, etc), being able to configure things so that a new fork of a given heroku app is created and deployed to for each new branch would simplify things a lot.