Licensing Questions

I still have not received a response from any of my reps letting me know if I am licensed for Domino on Linux for the mainframe. As I mentioned in a previous post as I can download it via Passport I would assume that I am (yes, I know about assuming). Today I got my latest shipment of media for 6.0.3 and 6.5. What is one of the CD's that I received: Lotus Domino 6.5 United Linux/Powered by United Linux 1.0 SP2 for Linux on S390 (zSeries).