YAMT is a GNOME program which helps you to organize your mp3s.

FEATURES:
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Currently YAMT supports the following:
  - Editing of single ID3 TAGs
  - Rename files based on their ID3 TAGs
  - Mass tagging with variables %dir and %file
    for the current directory and file
  - Auto tagging
  - Tag exchanging
  - Sorting (unsorting) into (from)subdirectories
  - Explore your mp3s (with filter ability)
  - Create Playlists

Most of this features can also be used recursive.