All kinds of neat ancient recordings (if you like that sort of thing) at the UC Santa Barbara Cylinder Preservation and Digitization Project website. I didn't even make it through the b's and found such gems as the Imperial Marimba Band with "American Pep" (1921); Arthur Collins and Byron G. Hardin's contemplative "Baboon Bungalow" (1909); "Be My Little Baby Bumble Bee" by Elizabeth Spencer and Walter Van Brent (1913); and, more lightheartedly, "Be Thou Faithful Unto Death" (190?) Fun for all!
Update: Dammit, the song links will only take you to the search page. If you check out anything, listen to "Baboon Bungalow."