The Kiddie Record King sells vintage records and record memorabilia. You can hear samples of many of records online (in all of their scratchy splendor). And there are 4 wonderful "galleries" of old phonographs, record sleeves and covers, artwork, and picture records. Great stuff, even if some of it is a little scary.
Many thanks to http://www.bibi.org/box/
Speaking of audio, have you heard about this Pandora.com? It’s “an automated music recommendation and Internet radio service created by The Music Genome Project.” You enter the music of your choice and it comes up with its own suggestions. (Forever?)