new Klezmer resource: Sherry Mayrent's "Klezmer Academy"
I'm not sure if this is new, or simply new to me—the KlezmerShack has been mightily distracted for a while. In all events, it's a great site:
Klezmer Academy, curated by clarinetist Sherry Mayrent, has klezmer tunes, discussions of klezmer theory, practical lessons on style, musings on current and past trends in the music and its performance, and other topics on all aspects of klezmer and its history.