I was reading at one hard core pro linux, anti MS site and this link was posted
http://www.lowendmac.com/archive/03/0725.html
The article goes through how crappy buymusic.com is because you can only use Internet Explorer (meaning Windows only) and one can only listen to the files with WMP because the files are encoded in an MS proprietary format (wmv) and that you can only listen to the files on 1 computer.
Is any of this info true? I've never used buymusic.com but if any of this is true, I don't think I ever will.