Hi Alan,
Currently we provide installations supporting SSRS 2005 (SQL Server 2005) and SSRS 2008 (SQL Server 2008 and 2008R2). We are now working on new versions of the Vision for SSRS (supporting VS2012 and SQL2012). There will be no separate licensing for the different versions of SQL. If you have a valid license subscription you will also be able to work with Vision for SQL 2012.
The new version should be available in couple of weeks.