@ Borchester: You can't link directly to a MIDI file at folkinfo.org--they're generated on demand as temp files which are wiped out periodically (like within an hour). Instead, you have to download the MIDI, rename it, and put it up on your own site. I've begun using Dropbox as a cloud storage file repository, since it doesn't munge the extension when generating download URLs, which means that if you post a link with that URL, other people can click on it and the MIDI should play (or download) for them in the same way Mudcat MIDIs do. A basic Dropbox account is free.