PS - Am I missing something or does the Rio Receiver not support sorting tracks by filename or ID3 track# tag?

By default, the songs under "Artists" soup are alphabetical by song title and can't be re-ordered. This was a specific request by Dell when they cut the deal with SonicBlue. It is anticipated that if/when the product gets another software release, this will get fixed.

In the meantime, work around it by creating .M3U playlists. You can order playlists any way you want, and the player will respect that order.

I think I'll put this one in the FAQ.