One of the foundation Working Groups, the Local Chapters Working Group was responsible for running the process of setting up federated OSM-Foundation Local Chapters, but is now rebooted as communication channel for existing and future Local Chapters.
Discussions and announcements will be made via local-chapters@openstreetmap.org. You can subscribe to this OSMF Local-Chapters mailing list at http://lists.openstreetmap.org/listinfo
Local Chapters page on the OSM wiki https://wiki.openstreetmap.org/wiki/Foundation/Local_Chapters