Finding SQL Server licensing information for 2005 and above.

I can use SELECT serverproperty('LicenseType'), serverproperty('NumLicenses') on SQL Server 2000 but these server properties are no longer being returned in SQL Server 2005 and later.  This information doesn't seem to be recorded in the registry for SQL Server 2005 and later.

Is there an easy way to query or report licensing information for SQL Server 2005 onwards?

Thanks.