Rockbox

I think Rockbox should use sorting tags, if present, to sort artists, albums, and tracks. This allows a graceful solution to the perennial question "What do I do to make Bob Dylan sort under 'D'?"

The ID3 and Ogg Vorbis tags that supply this information are listed below. There may be others for other tagging formats.

ID3 Ogg Vorbis
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TSOP ARTISTSORT
TSOA ALBUMSORT
TSOT TITLESORT

EXAMPLE 1: A file contains the tags ARTIST=Bob Dylan and ARTISTSORT=Dylan, Bob. The ARTIST tag is used for all display purposes, but the ARTISTSORT tag is used for listing artists.
EXAMPLE 2: A file contains the tag ARTIST=Grateful Dead but has no ARTISTSORT tag. The ARTIST tag is then used for both display and sorting.

The ARTISTSORT tag would be the highest-value addition to Rockbox, but ALBUMSORT and TITLESORT have potential value to users as well, such as sorting albums by date.