for those who download the flacs, i recommend burning them to cd-r AS FLAC FILES for posterity. that way, if you ever want to listen to the show, you just put the cd-r in your drive and play them with you favorite media player. and, if you need to, you can convert the flacs on the cd-r to wav/aiff on your hard drive and burn to an audio cd-r for yourself or someone else. and, of course, you can always convert those flacs to mp3 as needed.
there's no reason you have to keep flacs on your hard drive -- particularly if you do not have the space -- but there are good reasons to hang onto them in on some other media even if you don't have the hard drive space to keep them indefinitely on your computer.