The second generation diamond rio had USB about two years before iPod

I was grasping around in my head for the Rio and also for the iriver when i wrote that comment and couldnt come up with either one. I was actually a huge fan of the keychain shaped irivers.... I was dead convinced that it was only a matter of time before they drove apple out of the mp3 player market:

But the diamond was my second choice. I had a later generation diamond the one with the red thumbstick.

IIRC, the interface on both was pretty terrible. you had to skip songs one by one, and the contacts on the buttons tended to get get worn out, making them less responsive, from the constant pressing.