The NHIN Direct Project aims to enable secure and meaningful health information exchange over the internet. It has over 175 member organizations including healthcare IT vendors, health information exchanges, provider organizations, and government agencies. Members participate through various working groups that are developing specifications and use cases around content packaging, security, addressing, and routing for simple and scalable information sharing. The project's deliverables include formal specifications, reference implementations, testing frameworks, and policy recommendations to support nationwide health information exchange using the Direct standard.