I would also love to re-map the bomb for 0-rated to some other icon, or even just an ASCII sign... as is, when quickly scanning over tracks in MB gui (list view), I find 1-bomb (zero rated) hard to tell apart from 1-star (1 rated mp3 / 20 rated flac), whereas their use case is vastly differnt (for me), and they should communicate which is which more visually/easily in my book .
Churs.
c.