And they stopped doing this years ago. (To be precise, they did not disable it for existing models, but they did not add new models.)Actually that is not correct. I used to sync iTunes with my Rio 500 back in the day. I did a quick google to confirm that my memory isn't trashed:
Itunes 4.2 or later has built-in support for Rio One, 500, 600, 800, 900, Nike PSA, S Series players, Fuse, and non-Mass Storage (MSC) Cali and Chiba.