"There ought to be but one large art warehouse in the world, to which the artist could carry his art-works and from which he could carry away whatever he needed. " - Beethoven
the Internet? A website setting out to make good on Beethoven's wish is today's "Link of the Day":
Providing a forum for musicians (soloists and ensembles) to post their performances of works in the public domain. There is a eclectic mix of things and a forum to chat with others.
Give 'em a visit.