Just in case you’re one of the few users of MMITunes: I added a new feature to auto-create genre-based playlists in MMITunes v3.0. If you select create playlists for genres MMITunes will generate .m3u playlists for every genre it finds in the tracks on the selected volume (which ideally is an SD-card or similar).
If you find playlists with weird names like (79).m3u you will have to convert the ID3-tags of that particular track to a newer version. You’ll find the names of the tracks which may require attention in the MMITunes output window. To convert the ID3-tags simply open iTunes, right-click the track, select Convert ID3 tags and apply ID3 v2.4. An easier way is to convert all your tracks at once instead of selecting single tracks. Don’t forget to re-export the tracks you modified to your destination volume.
The names of the three default playlists MMITunes creates have changed slightly as well. MMITunes v3.0 is available in the downloads area.