I've been asked privately to discuss the relationship between this new Community category and the existing Related Projects category.
The purpose of Related Projects is to foster the Swift open-source community by allowing projects to host discussion forums here rather than managing their own server or mailing list. Each project gets its own sub-category. It's not really intended or suitable for one-off announcements of projects; likewise, Community isn't really intended or suitable for long-running discussions of goals, schedules, and work coordination. Projects that maintain forums in Related Projects would still be welcome to post announcements of major milestones in Community.