I needed EXTM3U playlists output, so I created a (dirty hack) bytecode modification which switches XSPF playlists for EXTM3U.
If you want it, you need to assemble it with .73 using flasm. The file is here: http://www.strawp.net/files/download/fireplay.7.3.flasm.zip
It only incorporates the artist name, song and URL. I wasn’t too bothered about the song length and writing in psuedo bytecode is a right pain so I left that out.