Just a note for those of you who like to trade music, say a rare b-side of the Fixx for example. There's a relatively new compression format called "Shorten" which is rather impressive. It doesn't compress quite as well as MP3, but the compression is "lossless" as they say. The sound quality is slightly better than MP3.

More info: http://www.etree.org/shnamp.html

Cheers everyone!