It seems like a cool idea, in theory at least.
But, realistically... if you have to copy the MP3 from flashcard onto a computer and then torrent it... how much longer does it take to start with the 24bit wave file, save to mp3 in your favorite editor, and torrent that? It might add 5 minutes to your workflow, but it avoids lugging the extra recorder, etc. Not worth the hassle in my book, but to each his own.