Old Topic - New Information
As per previous training (and confirmed today that it did indeed work this way previously) downloading a game or ringtone WAS considered an MMS message.
Now it is all part of MEdianet service. It is all charged as kB (or MB). Pay per use or packaged, depends on your plan. And you are not charged until you actually download the game or ringtone (the text message sent with the link is admin in nature and therefore is not charged to the user).
Cingular is conducting data training (at least in North Texas) to update it's reps on the many facets of selling and understanding data services.