I've always kept my FLAC originals off to the side, and then compressed them into MP3s, since the other MP3 players in the family were all small (the kids each had a 1G or 2G, and my wife had an older 30G Xen) and space was at a premium. I never thought to go back to putting the FLAC on my Phatbox, now that I've got the space. I'll give it a try!