The CILogon Service has now officially entered operation at https://cilogon.org. The service provides certificates to researchers for accessing NSF cyberinfrastructure (CI). It relies on the researcher's home organization, through the InCommon federation, to authenticate the researcher and provide the researcher's identity for inclusion in the certificate. We are working to support more InCommon member organizations, integrate with CI providers, and improve the usability and functionality of the service. Please contact us at firstname.lastname@example.org to learn more and/or to give your suggestions for improvement.