This script will export the artwork of the selected tracks, or the tracks in a selected playlist, as an image file to the folder which contains each selected track's file--presumably the track's Album folder--or a specific user-selected folder. If multiple album tracks are selected, the script will make sure only one artwork file per Album is exported.
OS X 10.6 or later only.
Also see Save Album Art as folder.jpg.
This Preferences pane for the script remembers your settings between uses.
Re-associate batch of dead tracks with files from selected folder
Export album artwork as folder.jpg to Album folder
Make one big playlist from many using original track order
Locates pairs of track entries pointing to the same file
Export files of tracks in two or more playlists to single folder
Perform search-and-replace on text in your choice of tags