Yiddish American Digital Archive
Helen Winkler sent this notice in to the Jewish-music list last Fall:
There's a new website, yiddishsong.org of the Yiddish American Digital Archive. Some Real Audio versions of 78's available for listening.
I went and looked, and there is some very neat material. There is also an incredibly long flash piece at the website entrance. If you stay and watch long enough, you see old Yiddish sheet music covers. But I dunno that it's worth the wait. Ari