The experts index in the developer guide is excellent for this - I *don't* follow every new issue that gets filed, but I pay close attention to the ones where I get added to the nosy list, and that's usually via the experts index module and topic entries. It also gives me an incentive to keep my entries in that file up to date (e.g. I was following tempfile when doing a lot of filesystem manipulation tasks at work, but stopped doing so quite some time ago).
We have some docs in the triager section of the guide about that, but perhaps it would help to emphasise it more in the core dev section?
The move to GitHub will also make it easier to follow new PRs, independently of the issue tracker.