There are two mailing lists — one for additions to the map and “featured galleries”, so you can know if a new gallery opens in your area (or that we just learned of it), and the other with information of interest to curators.
Normally these emails are about a new blog post. Either list may also occasionally be used for announcements pertaining to this site that don’t have a corresponding blog post.
Note: the map update notices are cross-posted to Facebook and Instagram, so you have those options also for following map updates. But social media sites will not necessarily show you all such posts.