I thought that the article below might be of interest to this group.
For me...the last two paragraphs are the best...
"Now postulate that a group of those with a common interest is formed
under one of the free services, for example, those at Yahoo Groups.
Such a group is the classical music exchange OperaShare
(http://launch.dir.groups.yahoo.com/group/OperaShare/).
Subject to rules on proper posting, notably including no recordings
currently in print, one may post there the URL for one's recent upload.
Or you may ask for a favorite title which someone is likely to post for
you. If one person asks for a good recording of the 1935 Met broadcast
of "Tristan und Isolde" with Flagstad and Melchior, someone will post
his for download. Then someone else may offer a copy from a better
source or one which has been cleaned up. Regardless, the recording is
available at an investment of interconnect time - and no other cost."'
Karl