It's been bugging me for a while that there is no good way to reach all people interested in the Search API at once. Only few will regularly scan all new issues (I think), and the project page won't be re-read that often, either.
I've tried to at least consistently tag issues with API changes lately, but a) I don't think many people are aware of that, b) I don't always think of it and c) there are sometimes other important developments that people should be aware of.
So this is a new try for such a list of announcements. People can just subscribe to this issue and I'll try to mention important issues or news here.
E.g., currently #1182614: Integrate with Facet API looks like it could bring quite a huge change to the project, and people coding for facets (or backends with facet support) should probably keep an eye on it.